PEXa PLUMBING DESIGN AND INSTALLATION GUIDE · REHAU provides a recommended specification for...

PEXa PLUMBING DESIGN AND INSTALLATION GUIDERAUPEX® UV Shield Pipe and EVERLOC+™ Compression-sleeve Fittings

1. Scope 3

2. System Overview 4 2.1 Application 4 2.2StandardsandCertifications 4 2.3Specification 5 2.4Warranty 5 2.5DesignServices 5

3. RAUPEX PEXa Pipe 6 3.1 Pipe Properties 6 3.2PipeDimensionsandWeights 6 3.3PipeMarkings 7 3.4PressureandTemperatureRatings 7 3.5ExcessiveTemperatureandPressureCapability 7 3.6CorrosionResistance 8 3.7ChlorineResistance 8 3.8UltravioletResistance 8 3.9BendRadius 9 3.10ChemicalCompatibility 9 3.11FreezeBreakResistance 9 3.12 Condensation 9 3.13 Pressure Loss 9

4. EVERLOC+ Compression-sleeve Fittings 10 4.1FittingScope 10 4.2FittingAssembly 12 4.3 Installation Considerations 12 4.4EVERLOC+Compression-sleeveTools 15

CONTENTS

Forupdatestothispublicationandthemostcurrenttechnicalinstructions,safetyinformationandmanufacturer’srecommendations,visitwww.na.rehau.com/resourcecenter

5. Design Considerations 17 5.1PipeSizing 17 5.2EquivalentLengthofFittings 18 5.3PipingLayouts 19 5.4ThermalExpansionandContraction 20 5.5InstallationinFire-ratedAssemblies 21 5.6OverheadInstallations 23 5.7WaterQuality 24 5.8HotWaterRecirculation 25 5.9WaterHammer 25

6. Installation Considerations 26 6.1LocalCodeApprovals 26 6.2Packaging,Transport,HandlingandStorage 26 6.3UncoilingPipe 26 6.4BendingPipe 26 6.5DistanceBetweenFittings 27 6.6PipeProtection 27 6.7Insulation 28 6.9FixtureConnectionCommonComponents 28 6.10WaterHeaterConnections 29 6.11SupportingRAUPEXPipe 29 6.12SupportingEVERLOC+Fittings 30 6.13CopperSoldering 30 6.14KinkRepair 31 6.15ThawingFrozenPipe 31 6.16Disinfection 31 6.17PressureTesting 32

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This technical information applies to the REHAU PEXa plumbing system and specifically the assembly and use of the EVERLOC+™ compression-sleeve system with RAUPEX® UV shield pipe (PEXa pipe) intended for use in hot- and cold-water potable distribution systems.

Forprofessionaluseonly.Personsusingthisguidemustbeexperi-encedandappropriatelylicensedcontractors,whohaveanunder-standingoftheprinciplesandpracticesfortheinstallationofhot-andcold-waterpotabledistributionsystems.

TheinformationpresentedinthisguideisintendedtodemonstratetheproperassemblymethodandinstallationrecommendationsfortheREHAUPEXaplumbingsystem.Itistheresponsibilityofthelicensedcontractortochecktheprevailinglocalcodesandtoverifythattechnicalinformationpresentedinthisguideisappropriateforaparticular installation.

Nothinginthisguidesupersedesnationalorlocalcoderequirementsortherecommendationsofothermanufacturersregardingtheircomponents.Observeallapplicablenational,stateandlocallaws,regulations,standards,codesandordinances.IfyoubelieveREHAUproductinformationconflictswithapplicablecoderequirements,industrystandards,ortherecommendationsofothermanufacturersregardingtheircomponents,contacttheREHAUdistributorinyourareaandconsultwiththebuildingauthorityhavingjurisdictionbeforeinstallingtheREHAUPEXaplumbingsystem.

Beforestartingtheinstallationprocess,readtheREHAUPEXa Limited Warranty,availableatwww.na.rehau.com/warranties.ItcanalsobeobtainedfromyourauthorizedREHAUdistributororbywritingtoREHAUConstructionLLC,1501EdwardsFerryRoadNE,LeesburgVA20176US.

Properinstallationistheresponsibilityoftheinstallingcontractor.ReviewtheREHAUTechnical GuidelinespriortoinstallationoftheREHAUPEXaplumbingsystem.REHAUTechnical Guidelines are definedintheREHAUPEXa Limited Warranty as:ThemostcurrentandapplicableversionsofallthetechnicalliteratureavailableontheREHAUNorthAmericawebsiteatwww.na.rehau.com/resourcecenter,including,butnotlimitedto,technicalmanuals,instructionguides,technicalbulletins,submittalsandREHAUAcademytrainingpresenta-tions.ChecktheREHAUResourceCenter(www.na.rehau.com/resourcecenter)forthelatestupdates.

ContacttheREHAUdistributorinyourareaifyoudonotunderstandtheinformationinthismanualorifyouhavequestionsabouttheREHAUTechnical Guidelines.

Thisguidecontainssafety-relatedinformationthatrequiresyourspecialattention.Itisindicatedwiththesafetyalertsymbolandthesignalwordsdescribedbelow:

DANGERIndicatesahazardoussituationwhich,ifnotavoided,willresultindeathorseriousinjury.

WARNINGIndicatesahazardoussituationwhich,ifnotavoided,couldresultindeathorseriousinjury.

CAUTIONIndicatesahazardoussituationwhich,ifnotavoided,couldresultinminorormoderateinjury.

NOTICE Indicatesariskofpropertydamage.

Onlytrainedpersonnelshouldbeengagedintheinstallationprocess.FollowtheinstructionsinthisguideandotherREHAUTechnical Guidelinesandusecommonsensetoreducetheriskofinjuryorpropertydamage.

WARNINGReadtheinstructionmanualfortheEVERLOC+compression-sleevetoolsbeforeuseandfollowallsafetyprecautions-improperusecancauseseriouspersonalinjury

WARNINGEVERLOC+compression-sleevetoolsuseastronghydraulicforcetoexpandPEXapipeandcompresscomponentsoftheREHAUEVERLOC+compression-sleevesystem.

Toreducetheriskofcrushandlacerationinjury,keepfingers,handsandallpartsofyourbodyawayfromtheexpanderhead,hydraulicslideandcompressionjawsduringoperation.Removethebatterybeforeattemptingtochangeoradjusttheexpanderheadorcompressionjaws.

EVERLOC®isaregisteredtrademarkofREHAU.DEWALT® andtheDEWALTlogoaretrademarksofStanleyBlack&Decker,Inc.,oranaffiliatethereofandareusedunderlicense.MAKITA®isatrademarkofMakitaCorporation,oranaffiliatethereof.

1. SCOPE

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2.1 ApplicationTheREHAUPEXaplumbingsystemincludesRAUPEXUVshieldPEXapipe,PEXacompressionsleevesandEVERLOC+polymerandlead-freebrassfittings.Thissystemisdesignedforpotableapplications.

TheEVERLOC+compression-sleevefittingsystemisacold-expan-sionPEXafittingsystemthatisavailableinpolymerandlead-free(LF)brassandisassembledwithaspeciallydesignedPEXacompressionsleeve.ThefittingisdesignedspecificallyforusewithRAUPEXpipeandcanonlybeassembledwiththeEVERLOC+compression-sleevetools.

Fig. 2.1: RAUPEX UV shield crosslinked polyethylene (PEXa) pipe

Fig. 2.2: EVERLOC+ compression-sleeve fittings and sleeves

2. SYSTEM OVERVIEW

Fig. 2.3: EVERLOC+ compression-sleeve tools

2.2 Standards and CertificationsThegoverningmodelcodeswithintheUnitedStatesandCanadadefinetherequiredstandardsforPEXpipingsystems.

IntheUS,themodelcodesthataretypicallyadoptedbylocaljurisdictionsare:theInternationalCodes(Mechanical,PlumbingandResidential)governedbytheInternationalCodeCouncil(ICC)ortheUniformCodes(MechanicalandPlumbing)andtheNationalStandardPlumbingCode,governedbytheInternationalAssociationofPlumbingandMechanicalOfficials(IAPMO).

InCanada,themodelcodethatistypicallyadoptedbylocaljurisdic-tionsistheNationalPlumbingCodeofCanada(NPCC)whichisgovernedbytheNationalResearchCouncilofCanada(NRCC).

Withinthesemodelcodes,thestandardrequirementsforPEXpipeandfittingsareASTMF877orCSAB137.5.ThesestandardsdefinetherequirementsandtestmethodsforPEXpipingsystems.

TheREHAUPEXaplumbingsystemisthird-partycertifiedbyNSFInternational(www.nsf.org)tothefollowingstandards:-ASTMF876StandardSpecificationforCrosslinkedPolyethylene(PEX)Tubing-ASTMF877StandardSpecificationforCrosslinkedPolyethylene(PEX)Hot-andCold-WaterDistributionSystems-CSAB137.5CrosslinkedPolyethylene(PEX)TubingSystemsfor

Pressure Applications-NSF/ANSI14PlasticPipingSystemComponentsandRelated

Materials-NSF/ANSI61DrinkingWaterSystemComponentsandRelated

Materials-NSF/ANSI372DrinkingWaterSystemComponents–LeadContent(complieswiththelead-freerequirementsoftheU.S.SafeDrinkingWater Act)

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2.3 SpecificationREHAUprovidesarecommendedspecificationfordomesticwaterpipingandfittings.Thisrecommendedspecificationisprovidedasaguidefordevelopmentofthefinalspecificationbyaarchitect,engineer,orbuilder.Thearchitect/engineer/buildershallberespon-sibletoconvertthisrecommendedspecificationintoafinalspecifica-tionthatmeetsthefunctionalneedsoftheclient,aswellastocomplywithallapplicablebuilding,plumbing,andmechanicalcodes.Specificationsareavailableatwww.na.rehau.com/resourcecenter.

2.4 WarrantyRAUPEXUVshieldpipeandEVERLOC+compression-sleevefittingsandsleevesarebackedbya25-yearlimitedwarranty.EVERLOC+compression-sleevetoolsarebackedbya2-yearlimitedwarranty.REHAUoffersthiswarrantywhentheinstallationiscarriedoutinaccordancewiththerequirementsoutlinedintheREHAUPEXa Warranty 855.018,whichisavailableasaseparatedocumentatwww.na.rehau.com/warranties.Pleasereadwarrantypriortoinstallation.

2.5 Design ServicesREHAUDesignServicescanprovidecustomerswithadetailedsubmittalpackagetosupporttheinstallationoftheREHAUPEXaplumbingsystem.

REHAUPlumbingDesignServicesinclude: - BIMlibraryofplumbingsystemcomponents - Productsubmittals - Projectbillofmaterials - Supportofpipelayoutbasedontheprojectengineer’sapprovedplumbingpipingdesign

2.5.1 Building Information Modeling LibraryTheREHAUBIMLibraryoffersadirectoryofdrawingsthatareeasytodownloadintoanactivedesign.BIMfilesofferefficienciestoprojectownersthrougheaseofcollaboration.TheREHAUBIMlibraryoffersmodelsofcoreproductsincludingpipe,fittings,manifoldsandinstallation accessories.

2.5.2 LoopCAD® SoftwareREHAUPlumbingCADcreatesprofessionalpipelayoutdrawingsandbillofmaterialsfortheREHAUPEXaplumbingsystem.

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3. RAUPEX PEXa PIPE

3.1 Pipe PropertiesCrosslinkedpolyethyleneispolyethylene(PE)whichhasundergoneachangeinmolecularstructurewherebythepolymerchainsarechemicallylinked,crosslinked(X),witheachothertoformathree-dimensionalnetwork.Theresultisaflexiblethermosetpolymerwithimprovedmechanical,thermalandchemicalproperties.

TherearethreemethodsofmanufacturingPEX:-Theperoxidemethod(PEXa),ASTMrequiresaminimumof70%crosslinkedPEmolecules-Thesilanemethod(PEXb),ASTMrequiresaminimumof65%crosslinkedPEmolecules-Theradiationmethod(PEXc),ASTMrequiresaminimumof65%crosslinkedPEmolecules

RAUPEXpipeismanufacturedusingtheperoxidemethod(PEXa),whichyieldsthehighest,mostconsistentlevelofcrosslinking.PEXatechnologyenhancesflexibilityandthermalmemory,providingeaseofhandlingandkinkrepaircomparedtoPEXbandPEXc.

PEXahasdistinctadvantagesovermetalandotherpolymerpipes:-Resistspittingandstresscorrosion-Resistsscalinganddepositbuild-upwhenusedwithbothhardandsoftenedwater-Minimizesnoisethatistransmittedthroughpipes-Resistsnotchingandabrasiondamage

RAUPEXismanufacturedbyREHAUinafacilitywhosequalitymanagementsystemisISO9001certified.Inaddition,RAUPEXproductionisindependentlymonitoredannuallyNSFInternational,CSAInternationalandUnderwritersLaboratoriesInc.(UL).

Table 3.1: RAUPEX Properties

Specification English SI Standard

MinimumDensity

58lb/ft3 926kg/m3 ASTMF876

MinimumDegreeofCrosslinkling

70% 70% ASTMF876

MaxThermalConductivity

2.84Btuin/(ft2 ˚F•hr) 0.41W/(m˚K) DIN16892

CoefficientofLinear Expansion

9.33x10-4in/ft˚F@68˚F1.33x10-3in/ft˚F@212˚F

0.14mm/(m˚C)@20˚C0.2mm/(m˚C)@100˚C

Mean @ 20-70˚CperDIN16892

ModulusofElasticity

87,000-130,500psi@68˚F43,500-58,000psi@176˚F

600-900N/mm2 @20˚C300-400N/mm2 @80˚C

Minimum@20˚CperDIN16892

Specification English SI Standard

Tensile Strength

4194-4355psi@68˚F2610-2900psi@176˚FperASTMD638

26-30N/mm2 @20˚C18-20N/mm2 @80˚CperASTMD638

--

IZODImpactResistance

No Break No Break --

Roughness e=0.00028in. e=0.007mm --

TemperatureWorkingRange

-40to200˚F -40to93˚C --

MaximumShort-termExposure

150psig@210˚F(48hr)

1035kPa@99˚C(48hr)

ASTMF876

UVResistance SeeTB218 ASTM2657

3.2 Pipe Dimensions and WeightsRAUPEXpipeisavailableinnominalsizesrangingfrom3/8to2in.RAUPEXisinaccordancetothedimensionalstandardsdefinedinASTMF876.RAUPEXiscoppertubesize(CTS)outsidediameter(OD),whichmeansthattheactualODofthepipeis1/8in(3.18mm)largerthanthenominalsize.

Wallthicknessisdefinedbythestandarddimensionalratio(SDR).RAUPEXUVshieldpipeisSDR9,whichequatestotheoutsidediameterbeingapproximatelyninetimesthewallthickness.

Table 3.2: RAUPEX Dimensions and Weights

Pipe Size Average OD in (mm)

Min Wall Thicknessin (mm)

Weightlb/ft (kg/m)

3/8in 0.500(12.70) 0.070(1.78) 0.04(0.07)

1/2in 0.625(15.88) 0.070(1.78) 0.06(0.08)

5/8in 0.750(19.50) 0.083(2.12) 0.08(0.11)

3/4in 0.875(22.22) 0.097(2.47) 0.10(0.15)

1 in 1.125(28.58) 0.125(3.18) 0.17(0.26)

11/4in 1.375(34.92) 0.153(3.88) 0.25(0.37)

11/2in 1.625(41.28) 0.181(4.59) 0.35(0.52)

2 in 2.125(53.98) 0.236(6.00) 0.60(0.90)

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3.3 Pipe MarkingsRAUPEXpipemarkingsarerepeatedevery3ft(0.9m),listallcertificationsandapprovals,andincludeanincrementalfootagemarkingtoassistwithinstallation.

3.3.1 PEX Designation CodeRAUPEXpipeisfurtheridentifiedwithaPEXMaterialDesignationcodeinaccordancetoASTMF876.ThePEXDesignationCodeistheabbreviationforthematerial-PEX-followedbyfournumerals.

The PEX Designation Code for RAUPEX UV shield pipe is

PEX 3306

Thefirstnumeral(3)referstothechlorineresistanceinoneoffourcategories,whentestedinaccordancewithASTMTestMethodF2023andevaluatedinaccordancewithASTMF876.Thismeasurementindicatestheallowablehoursof140°Fwaterrecirculationin1day.

0 = none1 = 4 hours

e.g., 25% of lifetime

3 = 12 hourse.g., 50% of lifetime

5 = 24 hourse.g., 100% of lifetime

Thesecondnumeral(3)referstoUVresistanceinoneoffourcategories,whentestedinaccordancewithASTMTestMethodF2657andevaluatedinaccordancewithASTMF876.ThemeasurementindicatestheallowabletimepipecanbeexposedtoUVwithoutbeingcompromised.

0 = none 1 = 1 month 2 = 3 months 3 = 6 months

Thethirdandfourthnumerals(06)refertotheHydrostaticDesignStressforwaterat73°Finhundredsofpsi.Thestandardpressureratingat73°Fisderivedfromthismeasurement.

06 = 630 psi

3.4 Pressure and Temperature RatingsThemaximumtemperatureandpressureratingsoftheRAUPEXplumbingsystemareinaccordancetoASTMF876,CSAB137.5andPPITR-3.Thedesignershalldeterminetheactualconditionsandapplytheappropriateandadditionaldesignfactorsasrequiredforanyparticularproject.

AccordingtotheREHAUPEXa Limited Warranty,theRAUPEXpipewarrantyperiodisforoperatingconditionsatorbelow180°F(82.2°C)inpermittedapplicationswhenthehandling,use,installationandmaintenancecontinuallycomplieswithallREHAUTechnical Guidelines.

Table 3.3: RAUPEX UV Shield Pipe Pressure and Temperature Ratings

RAUPEX UV shield Pipe

Maximum Pressures and Temperatures Design Factors

[email protected]°F(1055kPa@23°C) 0.50(perASTMF876,CSAB137.5)

100psi@180°F([email protected]°C) 0.50(perASTMF876,CSAB137.5)

80psi@200°F([email protected]°C) 0.50(perASTMF876,CSAB137.5)

REHAUdefinesElevated Temperature Applicationsasthosewithoperatingconditionsgreaterthan180°F(82.2°C).WhenRAUPEXpipesareplannedtobeoperatedinconditionsgreaterthan180˚F(82.2°C),thedesignermustsufficientlyconsiderthethermalandoxidativestabilityperformanceofthepipingmaterialtoensurethePEXapipedesignwillmeetprojectserviceliferequirements.

For Elevated Temperature Applications,REHAUadvisesagainsttheuseofastressreductiondesignfactorthatlowerstheoperatingpressureasitmaynotsufficientlyaccountforthermaloroxidativedegradation.

REHAUappliesaservicelifemethodologyforRAUPEXpipesdrawnfromASTMF876,CSAB137.5,ISO9080andMiner'sruleaccordingtoDIN13760todeterminethewarrantyperiod.RAUPEXpipesshouldalwaysbeoperatedatorbelowtheREHAUpublishedtemperatureandpressureratings.

Whentheoperatingconditionsarelessthanorequalto180°F(82.2°C),thenaccordingtotheREHAU PEXa Limited Warranty thewarrantyperiodforRAUPEXpipeis25years.WhenRAUPEXpipesare operated in Elevated Temperature Applications,wheretheoperatingconditionsaregreaterthan180°F(82.2°C),contactREHAUEngineeringtoverifyyouroperatingconditionscomplywiththerequirementsintheREHAU PEXa Limited Warrantyforawarrantyperiodof25years.

3.5 Excessive Temperature and Pressure CapabilityTemperatureandpressure(T&P)reliefvalvesaresafetymechanismsincasethesystemoverheats(mandatoryinhotwaterdistributionsystems).Thesevalvesactquicklytorelieveexcesstemperatureorpressureifeitheroneoftheseconditionsisreached.IntheeventofawaterheatingsystemfailureorT&Preliefvalvefailure,RAUPEXpipehasbeentestedtoaccommodateshort-termexposureconditionsof210°F(99°C)at150psi(10bar)for48hours.

NOTICEFailuretofollowpressureandtemperaturelimitsmaydamagethepiperesultinginleaksandoperationalfailures,andwillnegateanywarrantyprovidedbyREHAUforRAUPEXpipes.Thedesignermustincorporatepropercontrolsintothesystemtoensurethepressureandtemperaturecapabilityofthepipeisnotexceeded.

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3.6 Corrosion ResistanceRAUPEXpipeisnon-reactiveanddisplaysexcellentcorrosionresistance.Corrosionisaprocessthatrequireselectricallyconductivematerialsandoccursonmetals.PEXa,beingadielectric,doesnotcorrodelikemetalpipes.PEXaalsoresiststhebuildupofscalewhichiscommonwithcopperpipe.

3.7 Chlorine ResistanceRAUPEXpipehasbeentestedinaccordancewithASTMF2023,Standard Test Method for Evaluating the Oxidative Resistance of Crosslinked Polyethylene (PEX) Tubing and Systems to Hot Chlorinated Water asrequiredinASTMF876.RAUPEXpipeexceedstheminimumextrapolatedtestlifetimeascertifiedbyNSFandPPIforcoldwaterapplications,intermittenthotwaterapplicationsandtimedhotwaterapplications.

Basedonthistesting,whenusingRAUPEXUVshieldpipeforplumbingapplicationswithoutcontinuoushotwaterrecirculation,thefollowingwaterqualityconditionsmustbemet:-ThepHofwateris7.0orhigher-Theconcentrationoffreechlorineis4.0ppmorlower-Watertemperatureis140°F(60°C)orlower-Waterpressureis80psig(550kPa)orlower-Oxidativereductionpotential(ORP)of825mVorlower

ThisrecommendationappliestoRAUPEXUVshieldplumbingpipesforcoldwaterandintermittenthotwaterapplications(25%@140°F,75%@73°F)andfortimedhotwaterrecirculationsystemsforupto12hoursperday(50%@140°F,50%@73°F).TheASTMF876standardincludesdesignationcodesfortheseapplicationswhichareincludedontheprintlineofRAUPEXpipes.

WhenusingRAUPEXUVshieldpipeforplumbingapplicationswithcontinuoushotwaterrecirculation,thefollowingwaterqualityconditionsmustbemet:-ThepHofthewateris7.9orhigher-Theconcentrationoffreechlorineis2.4ppmorlower-Watertemperatureis140°F(60°C)orlower-Waterpressureis80psig(550kPa)orlower-Oxidativereductionpotential(ORP)of750mVorlower

Iftheseconditionsarenotmet,itisnecessarytoincorporateatimecontrolsothesystemoperatesatamaximum50%@140°Fand50%@73°F.

Itshouldalsobenotedthatinrareandisolatedcases,othercharac-teristicsofthemakeupofdrinkingwatercanimpactthelong-termperformanceofplumbingsystemcomponentsevenwhenthewaterqualitylevelsarewithinthepermissiblerangesetforthbythe

EPANational Primary Drinking Water RegulationsandtheGuidelines for Canadian Drinking Water QualitybyHealthCanada.Thelicensedinstallingcontractormusthavepracticalexperiencewithintheregionofintendeduse.Inaddition,consultationwiththelocalplumbingauthorityandlocalwaterauthorityregardingtheperformanceofplumbingsystemcomponentsshouldoccurbeforetheselectionandinstallationofsystemswithinthatspecificgeographicregion.Therefore,thespecificapplicationshouldalsobetakenintoconsider-ationwhendesigningandinstallingplumbingsystems.

3.8 Ultraviolet ResistanceAllpolymersaresusceptibletodamagefromexposuretotheultraviolet(UV)radiationinsunlight.PEXpipescanbedesignedtoprotectagainstshort-termUVdamage,butaftersometime,UVradiationwillreducethelifetimeofthepipe.Theextentofthereductiondependsonfactorssuchastemperature,pressureandchlorinationlevelsinpotablewater.

REHAUhasperformedextensivetestingofRAUPEXpipesexposedtonaturalsunlight,leadingtothemaximumUVexposuretimesex-pressedinaccumulateddays.Oncethepipesleavethemanufacturingplant,anyexposuretoUV,includingtransportationandstoragebythewholesaler,ispartoftheaccumulatedexposuretime.

AlthoughASTMF876onlycategorizesupto6monthsofUVresis-tance(MaterialDesignationCode=3306),REHAUhastestedandcertifiedRAUPEXUVshieldpipeaccordingtoASTMF2657forthefollowingmaximumUVexposureperiod:

-RAUPEXred,whiteandblueUVshieldpipe:Maximumexposuretimeofoneyearaccumulated

RAUPEXpipesmustbekeptintheoriginalpackaginguntilthetimeofinstallation.RAUPEXmustnotbestoredoutdoorsandisnotdesignedforpermanentoutdoorexposure(withtheexceptionofnon-exposedburiedapplications).ExcessiveUVexposurewillreducethelifetimeofPEXapipe.

3.8.1 UV Emitted by Fluorescent LampsASTMF2657wasestablishedtotesttotheworstcasescenarioforUVexposurebytestingindirectsunlight.UVemittedbyfluorescentlampsisinsignificantwhencomparedtoUVpresentinsunlight.GELightinghasstated“SolarUVisenormouslymorephotoactiveanddamagingthantheUVfromlinearfluorescentlamps.SolarUVincludesUV-A,UV-BandUV-C.UV-AisnearUV,notveryenergeticandisthebulkofUVemittedbyflorescentlamps.”Therefore,when

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REHAUPEXapipesareinstalledinthepresenceoffluorescentlampstheUVemittedbythoselampsshouldhavenoeffectonthelifetimeofthepipes.Forexample,thereisnoconcernofUVdamageonREHAUPEXapipesinstalledinaboilerroomwherefluorescentlampsarepresent.

NOTICEFailuretofollowmaximumUVexposurelimitsmaydamagethepiperesultinginleaksandoperationalfailures,andwillnegateanywarrantyprovidedbyREHAUforRAUPEXpipes.

3.9 Bend RadiusRAUPEXpipemaybebent,evenwhencold.REHAUsupportbendscanassisttocreatetightbendswithoutkinking.Thetypicalbendradiususedbytheinstalleris8XtheOD.Theminimumbendradiusis5XtheODforcoldbends.Foranevensmallerbendradius,thepipemaybeheatedwithaheatgunandbenttonolessthan3XtheOD.Ifatighterbendradiusisrequired,thenthedesignershouldconsiderusingasmallerdiameterpipe.

Table 3.4: RAUPEX Bend Radius

Bend Radius in (mm)

Pipe Size Typical 8X OD Min. Cold 5X OD Min. Heated 3X OD

3/8in 4.0(102) 2.500(64) 1.500(38)

1/2in 5.0(127) 3.125(79) 1.875(48)

5/8in 6.0(152) 3.750(95) 2.250(57)

3/4in 7.0(178) 4.375(111) 2.625(67)

1 in 9.0(229) 5.625(143) 3.375(86)

11/4in 11.0(279) 6.875(175) 4.125(105)

11/2in 13.0(330) -- --

2 in 17.0(432) -- --

3.10 Chemical CompatibilityWhileRAUPEXpipesareresistanttomanychemicalsthatareusedintypicalplumbingapplications,therearesomechemicalsthatmaydamagethepipe.

Chemicalsthatmaybedamaginginclude(butarenotlimitedto):-Adhesives-Oilorpetroleum-basedproducts-Paints-Solvents-Oxidizingagents-Disinfectants-PVCglues-Solventsandcements

Manyfactors,suchasexposuretime,temperature,pressureandotheroperatingparameters,caninfluencetheperformanceofapipethatisexposedtoachemical.Todeterminetheimpactofaparticularchemical,short-andlong-termpressuretestingmayberequired.Insomecases,apipemayberesistanttoshort-termexposuretothechemical,butnotresistanttocontinuousexposure.Eachchemicalmustbeevaluatedindividually.Itistheresponsibilityoftheinstallingcontractortoverifychemicalcompatibilityofanychemicalswhencomingintocontactwiththepolymermaterial.

3.11 Freeze Break ResistanceTheflexibilityoftheRAUPEXpipeallowsittoexpandaswaterfreezesinthepipeaslongasthepipehasroomtoexpand.Whenthewaterthaws,thepipereturnstoitsoriginalshape.Ifthepipeisnotallowedtoexpand(e.g.,itisencasedinconcrete),itmayburst.

NOTICEDesignersandinstallersmusttakeprecautionstoensurethatpipesdonotfreeze.Frozenpipesmayburstresultinginleaksandoperationalfailures.

3.12 CondensationCondensationoccursonpipeswhenthesurfacetemperatureislowerthanthedewpointoftheenvironment.Thisistypicallyaproblemformetalliccoldwaterpiping.PEXpipehasalowerthermalconductivity(0.41W/m°K)thancopper(401W/m°K)resultinginlessheatlosstothesurfaceandgreaterresistancetocondensationorsweating.Insulationshouldbeappliedtopipingtohelppreventcondensation.

3.13 Pressure LossThepressurelossinthePEXasystemdependsontheflowrate,watertemperaturesandthepropertiesofthefluid.UsetheREHAULoopCAD®Softwarewhichincludesabuilt-incalculatortodeterminepipepressurelossesforthegivenconditions.RefertotheREHAU PEXa Piping Systems Pressure Loss Tablesfortheapplicablepressurelosstablepresentedattypicalflowratesandwatertemperatures.ThepressurelossinPEXacarrierpipeisbasedontheapplicationoftheD’Arcy-WeisbachequationandfluidpropertiesfromASHRAEFundamentals.

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4. EVERLOC+ COMPRESSION-SLEEVE FITTINGS

4.1 Fitting Scope TheEVERLOC+compression-sleevesystemisacold-expansionPEXafittingsystemthatisavailableinpolymerandlead-free(LF)brassandisassembledwithaspeciallydesignedPEXacompressionsleeve.ThefittingisdesignedspecificallyforusewithRAUPEXpipeandmustonlybeassembledwiththeEVERLOC+compression-sleevetools.

EVERLOC+fittingsareavailablein3/8,1/2,5/8,3/4,1,11/4,11/2and2in.sizesandareintendedforusewithRAUPEXSDR9coppertubesize(CTS)pipemanufacturedinaccordancewithASTMF876

ForadetaileddescriptionoftheREHAUsystemcomponents,refertotheREHAUSustainable Building Technology Product Catalog (855.312).

4.1.1 Fitting FeaturesEVERLOC+polymerandlead-free(LF)brassfittingshavethefollowingfeatures:1. Foursealingedges2. Pipe stop3. Fittingcollar4. Tooljawbody

Fig. 4.1: EVERLOC+ fitting features

4.1.2 Fitting and Sleeve MarkingsAllpolymerfittingsincludethefollowingmarksforidentification

OR

Fig. 4.2: Fitting size marking (e.g., 3/4”)

Fig. 4.3: Batch code (e.g., production date)

AllLFbrassfittingsaremarked"REHAU"

Allsleevesincludethefollowingmarksforidentification

-Sleevesize(e.g.,1/2")-Batchcodeforproductiondate

Fig. 4.4: Sleeve markings

1

2

4

3

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4.1.3 Polymer FittingsEVERLOC+polymerfittingsareavailableincouplings,tees,elbows,multi-portteesandplugs.Allpolymerfittingsareproducedfromapolyphenylsulfone(PPSU)materialthatmeetstherequirementsofNSF61forhealtheffectsofdrinkingwatersystemcomponentsandcomplieswiththelead-freerequirementsoftheU.S.SafeDrinkingWaterAct.SeealsoREHAUTechnical Bulletin TB265 EVERLOC+ Polymer Fitting Material - PPSU.

Fig. 4.5: EVERLOC+ polymer fittings

4.1.4 Lead Free (LF) Brass FittingsEVERLOC+LFbrassfittingsareavailableascouplings,tees,elbows,plugsandtransitionfittingstoNPTthreadandcoppersolderconnections.AllmetalfittingsareproducedfromECOBRASS®(UNS69300orCW724R)thatmeetstherequirementsofNSF61forhealtheffectsofdrinkingwatersystemcomponentsandcomplieswiththelead-freerequirementsoftheU.S.SafeDrinkingWaterAct.SeealsoREHAUTechnical Bulletin TB264 EVERLOC+ Lead-free Brass Fitting Material.

Fig. 4.6: EVERLOC+ LF brass fitting

4.1.5 Metal ManifoldsManifoldsare1in.TypeLcopperwithEVERLOC+LFbrassfittingsbrazedintotheheader.

Fig. 4.7: EVERLOC+ metal manifold

4.1.6 PEXa Compression SleevesEVERLOC+compressionsleevesareproducedusingaspeciallyformulatedPEXamaterialandaredesignedspecificallyforusewithEVERLOC+fittingsandRAUPEXpipe.EVERLOC+compressionsleeveshavethefollowingfeatures:-Co-extrudedplatinum-coloredPEcoating-Squarelycutendsthatcanbeslidoverthepipeineitherdirection-Groovedandroughenedinsidesurfaceforlockingthesleeveintoplaceonceslidoverthepipeandfitting

Fig. 4.8: EVERLOC+ compression sleeves

4.1.8 CertificationsTheEVERLOC+compression-sleevesystemiscertifiedtothefollowingstandards:-ASTMF877,Standard Specification for Crosslinked Polyethylene

(PEX) Hot- and Cold-Water Distribution Systems-NSF/ANSI14,Plastic Piping System Components and Related

Materials-NSF/ANSI61,Drinking Water System Components – Health Effects-NSF/ANSI372,Drinking Water System Components – Lead Content-CSAB137.5,Crosslinked polyethylene (PEX) Tubing Systems for

Pressure Applications

11

4.2 Fitting Assembly Beforestartingtheinstallationprocess,readtheEVERLOC+ Compression-sleeve System Product Instructions (855.724).

AssemblingtheEVERLOC+compression-sleevesystemrequirestheuseoftheEVERLOC+compression-sleevetools.OnlymakeEVERLOC+compression-sleevejointswiththesetools.RefertoEVERLOC+ Power Tool Product Instruction Manual (855.725),EVERLOC+ XL Power Tool Product Instruction Manual(855.728)andEVERLOC+ XL Expander Tool Product Instruction Manual(855.729)foracompleteunderstandingofoperation,careanduseoftheEVERLOC+compression-sleevetools.

WARNINGReadtheinstructionmanualfortheEVERLOC+compression-sleevetoolsbeforeuseandfollowallsafetyprecautions-improperusecancauseseriouspersonalinjury.

WARNINGToreducetheriskofpermanenteyeinjury,alwayswearclose-fittingprotectiveeyewearwithsideprotection.Eyewearmustbeimpact-ratedandmarkedascomplyingwithANSIZ87.

NOTICEUseonlyEVERLOC+compression-sleevetoolsforassemblyandinstallation.Useofothertoolswillresultinanimproperlyassembledjoint,whichmayresultinleakingandpropertydamage.

ThebasicprocessofassemblinganEVERLOC+compression-sleevejointisasfollows:-Makeaclean,squarecutoftheRAUPEXpipeusingaRAUPEX

cutter-SlidetheEVERLOC+compressionsleeveovertheRAUPEXpipeensuringthesleeveisaminimumoftwotimesthelengthofthesleevefromtheendofthecutpipetoallowforexpansionofthepipeonly-ExpandtheRAUPEXpipetwice,ensuringtheexpanderheadisrotated1/2ofoneexpanderheadsegmentbetweenexpansions,usingtheEVERLOC+compression-sleevetools-InserttheEVERLOC+compression-sleevefittingintotheexpandedendoftheRAUPEXpipeuntilthepipeistouchingthepipestoponthefitting-CompresstheEVERLOC+compressionsleeveovertheRAUPEXpipeandEVERLOC+compression-sleevefittingusingtheEVERLOC+compression-sleevetools

Requiredassemblytoolsinclude:-RAUPEXcutter-EVERLOC+compression-sleevetools-EVERLOC+expanderheadsandcompressionjaws

4.3 Installation Considerations Someprecautionsandadditionalconsiderationsthatshouldbetakenwheninstallingthesystem.

4.3.1 EVERLOC+ Fitting Removal -EVERLOC+LFbrassfittingsCANbereused,aslongtheribareawasnotdamagedduringremoval.-EVERLOC+polymerfittingsCANNOTbereusedandshouldbediscardedimmediately.-EVERLOC+compressionsleevesCANNOTbereusedandshouldbediscardedimmediately.

Fig. 4.9: DO NOT cut the EVERLOC+ compression sleeve from finished joint

Fig. 4.10: DO NOT cut RAUPEX pipe from fitting

4.3.1.1 Fitting Removal of Completed Joint (LF brass ONLY)IfitisrequiredtoremovetheLFbrassfittingordisassembletheLFbrasscompression-sleevejoint,usethefollowingprocedure:

Ifthefittinghasbeeninsertedintothepipeandthesleevehasbeencompressed,safelyholdthefittingwhileitisheated.Becarefulnottodamagethefittingwiththetool.

1. Heatthesleevedirectlyusingaheatgun.2. Rotatethejointseveraltimeswhileheating.3. Removeheatanduseplierstopullthesleeveoffthefitting,thenimmediatelypullthefittingoutofthepipe.

CAUTIONDonotuseopenflamestodisassemblethejoint.Openflamescancauseinjuryorpropertydamage.

12

Fig. 4.11: Heating EVERLOC+ compression sleeve with heat gun

Fig. 4.12: Removing pipe from LF brass fitting

Forre-assemblyofajoint,thefollowingshouldbeconsidered:-Theendofthepipewherethepreviousfittinghadbeeninstalledmustbecompletelycutoffpriortomakinganewjoint.Cuttingoffaminimumof3in(approximately75mm)isrecommended.

Fig. 4.13: Cut off 3 in. of pipe from end prior to making new joint

4.3.1.2 Fitting Removal of Partially Completed Joint (LF Brass ONLY)Ifthefittinghasbeeninsertedintothepipe,butthesleevehasnotbeencompressed,attempttoremoveitwithoutdamagingthefitting.Iffittingcannotbeeasilyremoved,heat1to11/2in(25to38mm)ofthepipethatcoversthefittingandpullthefittingoutofthepipe.

4.3.2 Protecting EVERLOC+ JointsREHAUpermitsEVERLOC+compression-sleevejoints(polymerandLFbrass)tobeburiedorconcealed.REHAUrecommendsthreadedconnectionsneverbeburiedorconcealedastheymustbeaccessibleforperiodicinspection,perprevailinglocalcodes.

TherequirementtowrapanEVERLOC+jointcandependonmanyfactorsincludinglocationandthepresenceofothermaterialsthatcontactorcancomeincontactwiththejoint.

WhenwrappinganEVERLOC+joint,thefollowingisrequired:-Wrapthejoint,ensuringaminimumof50%overlapofthetape-Avoidwrinklesorkinksinthetapeandensurethejointiscompletelycovered,extendingontothepipeasnecessary-Indicatethelocationofeachjointasrequiredonthe“as-built”drawings

Fig. 4.14: REHAU Protective Tape, Red Fig. 4.15: Linerless Rubber Tape, Black

Note:UseonlyREHAUrecommendedprotectivetapesreferencedinREHAUTechnical Bulletin TB266 Protecting EVERLOC+ Joints.Donotuseothertypesoftapes(e.g.,ducttape,standardelectricaltape)towrapthejoint,aschemicalsintheadhesivemaynotbecompatiblewiththePPSUfittingmaterialorthePEXapipe.

Note:Neveruseheatshrinktubing(e.g.,RAUCROSS)towrapthejoint,astheextremelyhightemperaturesproducedfromaheatgunwillsoftenthepipeandmaycauseittopullawayfromthefitting.

Fig. 4.16: DO NOT use heat shrink tubing for EVERLOC+ joints

4.3.2.1 Concealed in Inaccessible Locations WhenEVERLOC+jointsareconcealedbutarestillinopenairspace(e.g.,behinddrywall),itisnotnecessarytowrapthejoint.However,theinstallershouldensurethefittingdoesnotcomeincontactwithchemicals(e.g.,PVCglues,solventsandcements)thatcoulddamagethefittingmaterial.

4.3.2.2 Buried in a Concrete Slab or sub-base underneath slabWhenburyinganEVERLOC+polymerjointdirectlyinaconcreteslab,orinthesub-baseunderneaththeslab,itisnotnecessarytowrapthejoint.However,therearesomeadditivesinconcreteorchemicalsusedintheinstallationthatcouldpotentiallydamagethefittingmaterial,andinthiscase,wrappingisrecommended.EVERLOC+LFbrassjointsburieddirectlyinaconcreteslaborinthesub-baseunderneaththeslabmustbewrapped.

13

4.3.2.3 Buried in Soil:WhenburyingEVERLOC+jointsinsoil,outsideofastructure,thejointmustbewrapped.

4.3.2.4 With Foaming Agents:Foamingagentsandsolventsinclosed-cellfoaminsulationkitscandamagethePPSUfittingmaterial.Therefore,itisnecessarytowrappolymerfittingsinaprotectivetapetoprotectfrompolyurethanefoams.

4.3.3 Pressure TestingThecompression-sleevejointisreadyforimmediatepressuretestanduseaftercompletionoftheassemblyprocess.Thereisnowaittimeforthesystemtobeputintoservice.SeeSection6.17.2forREHAUpressure test procedures.

4.3.4 Pressure and Temperature RatingsThemaximumtemperatureandpressureratingsoftheREHAUPEXaplumbingsystemareinaccordancewithASTMF877andCSAB137.5forSDR9PEX,asdefinedinSection3.4.

4.3.5 Ultraviolet ResistanceThefittingsandsleevesmustneverbestoredindirectsunlightorstoredoutsideoftheoriginalcardboardpackaging.Inaddition,thesystemisnotintendedforpermanentoutdoorapplicationsorinareaswithcontinuousexposuretoUV.

4.3.6 Freeze Break ResistanceTheflexibilityoftheRAUPEXpipeallowsittoexpandaswaterfreezesinthepipeaslongasthepipehasroomtoexpand.However,thisflexibilitydoesnotensuretheintegrityofthejoint.Therefore,installersmusttakeprecautionstoensurethatpipesandfittingsdonotfreeze.Freezingmayresultinleaksandoperationalfailures.

4.3.7 Chlorine ResistanceEVERLOC+compression-sleevejointshaveachlorineresistanceratingbasedontheratingsofRAUPEXpipe,asdefinedinSection3.7.

4.3.8 Stress Corrosion ResistanceEVERLOC+LFbrassfittingshavebeentestedinaccordancewithNSF/ANSI14andcomplywiththerequirementforstresscorrosionresistance.However,fittingsshouldnotbeexposedtoharmfulchemicalsoraggressivewaterconditionsthatcouldresultinopera-tionalfailures.

4.3.9 Chemical CompatibilityTherearecertainchemicalsthatcandamagetheEVERLOC+compression-sleevesystem.Thisappliestoexternalexposureofchemicalsandtothetransportofsuchchemicalsbythepipingsystem.Chemicalsthatmaydamagethecompression-sleevesysteminclude(butarenotlimitedto):-AdhesivesandtapesotherthanthoserecommendedbyREHAU-Oil/petroleum-basedproducts-Paints,solvents-Oxidizingagents(e.g.,bleach)-Disinfectants(e.g.,separatedosingunitintegratedintobuildingdistributionsystem)-PVCglues,solventsandcements

Fig. 4.17: DO NOT use harmful chemicals near EVERLOC+ fittings

Ensurethattheemployedsealants,cleaningagents,buildingfoams,insulation,protectivetape,adhesivetapeorthreadsealantsdonotcontainanycomponentswhichcausestresscrackingorcorrosion,suchasammonia,ammonia-bearing,aromaticandoxygenatedsolvents(e.g.,ketoneandether),chlorinatedhydrocarbonsorchlorideionswhichcanleach.

Protectsystemsagainstcontacttochemicalsanddamage.Onlyuseleakdetectionagents(e.g.,foamingagents)approvedbytherespectivemanufacturerforPPSUmaterials.Onlyusesealants,threadsealants,cleaningagents,buildingfoams,insulation,protectivetape,adhesivetapeandfluxapprovedbytherespectivemanufacturerforthePPSUmaterials.Checkthecompatibilityofmaterialsforthecorrespondingareaofapplicationwiththemanufacturer.

Contactwitharomaticandoxygenatedsolvents(e.g.,ketoneandether)aswellashalogenatedhydrocarbons(e.g.,chlorinatedhydrocarbons)isnotpermitted.Contactwithwater-basedacrylicpaintsandadhesive/protectiveprimersisnotpermitted.

14

4.3.10 Copper SolderingPropersolderingtechniquesmustbefollowedwhensolderingallcompression-sleevefittingsaccordingtotheCopper Development Association (CDA) Handbook: -Thesurfaceofthefittingsolderingareamustbeproperlycleanedforagoodsolderconnection.Applyingfluxisnotconsideredsufficientcleaningforthesolderingarea.Usingapropersandingorbrushtechniqueisnecessarytoremovethesurfaceoxides.Inordertopreventfurtherformationofoxides,thefluxshouldbeappliedimmediatelyafterthecleaningprocess.Aproperfluxthatiscompatiblewiththebrassalloymustbeused.-Caremustbetakentonotoverheatthesolderingsurfaceasthiscanleadtotheformationofoxidespreventinggoodadhesionofthesoldermaterial.Itisimperativethatthefittingisheatedevenlyaroundtheentiresurfacesoastonotoverheatoneparticulararea.-Allcompletedsolderjointsmustbetestedforjointintegrityfollowingtheproceduresprescribedbyprevailinglocalcodes.

4.4 EVERLOC+ Compression-sleeve ToolsAssemblingtheEVERLOC+compression-sleevesystemrequirestheuseoftheEVERLOC+compression-sleevetools.OnlymakeEVERLOC+compression-sleevejointswiththesetools.

Beforeuse,readandunderstandthefollowingsafetysymbolswhicharefoundontheEVERLOC+compression-sleevetools.

SafetyAlertSymbol–Toreducetheriskofinjury,followthespecifiedsafetyinstructions.

Readandfollowallsafetyprecautionsintheinstructionmanual.Improperusecanleadtoseriouspersonalinjuryorpropertydamage.

Toreducetheriskofseriouseyeinjury,alwayswearproper eye protection.

Riskofelectricshock.Neveroperatethepowertoolindamporwetconditions.Neverexposetorainorsubmergeinwaterorotherliquids.Neveroperatethepowertoolnearwiresorcablescarryingelectriccurrent.

Toreducetheriskofseverepersonalinjury,includingcrushandlacerationinjury,keepfingers,handsandallpartsofyourbodyawayfromtheexpanderhead,hydraulicslideandcompressionjawsduringoperation.

NOTICEUseonlyEVERLOC+compression-sleevetoolsforassemblyandinstallation.Useofothertoolswillresultinanimproperlyassembledjoint,whichmayresultinleakingandpropertydamage.

4.4.1 EVERLOC+ Power Tool 3/8 to 1 in.ForassemblyofEVERLOC+fittingsinsizes3/8through1in.UsetheEVERLOC+powertool.RefertoEVERLOC+ Power Tool Product Instruction Manual (855.725)foracompleteunderstandingofoperation,careanduseofthetool

Fig. 4.18: EVERLOC+ power tool

EVERLOC+powertoolstandardkit,Art.105107-001:-EVERLOC+powertool-Expansionadapter-1/2,3/4and1in.EVERLOC+expanderheads(quickchange)-1/2,3/4and1in.EVERLOC+compressionjaws-DEWALT®12VLi-ionbattery(DCB127)(2batteriesperkit)-DEWALT12V/20VLi-ioncharger120VAC(DCB107)-DEWALT12V/20VLi-ionBatteryChargerInstructionManual-Pipe cutter-Lubricant-Cleaningbrush-Tool case-Product Instruction Manual

Fig. 4.19: EVERLOC+ power tool standard kit

AvailableAccessories:-3/8in.expanderhead(quickchange)-3/8in.compressionjaws-5/8in.expanderhead(quickchange)-5/8in.compressionjaws

15

4.4.2 EVERLOC+ XL Power Tool 1 1/4 to 2 in.AssemblingtheEVERLOC+compression-sleevesystemwithdiametersof11/4through2in.requirestheuseoftheEVERLOC+XLpowertool.Refertothe EVERLOC+ XL Power Tool Product Instruction Manual(855.728)foracompleteunderstandingofoperation,careanduseofthetool.

Fig. 4.20: EVERLOC+ XL power tool

EVERLOC+XLpowertoolstandardkit,Art.105733-001:-EVERLOC+XLpowertool-Expansionadapter-11/4,11/2and2in.EVERLOC+expanderheads(quickchange)-11/4,11/2and2in.EVERLOC+compressionjaws-MAKITA®18VLi-ionbattery(BL1840B)(2batteriesperkit)-MAKITA18VLi-ioncharger120VAC(DC18RC)-MAKITA18VLi-ionBatteryChargerInstructionManual-Pipe cutter-Lubricant-Cleaningbrush-Toolcase(blacklatches)-Product Instruction Manual

Fig. 4.21: EVERLOC+ XL power tool standard kit

AvailableAccessories:-EVERLOC+XLexpandertoolstandardkit,Art.106096-001-EVERLOC+XLexpanderbasetool,Art.105419-001

4.4.3 EVERLOC+ XL Expander Tool 1 1/4 to 2 in. InadditiontotheEVERLOC+XLpowertool,theEVERLOC+XLexpandertoolcanbeusedfortheexpansionstepsofthe11/4to2in.fittingassemblyprocess.UseofthistoolinadditiontotheXLpowertoolallowsforgreaterefficiencyinsomeinstallationsituations.RefertotheEVERLOC+ XL Expander Tool Product Instruction Manual (855.729)foracompleteunderstandingofoperation,careanduseofthetool.

Fig. 4.22: EVERLOC+ XL expander tool Fig. 4.23: EVERLOC+ XL expander tool

standard kit

EVERLOC+XLexpandertoolstandardkit,Art.106096-001-EVERLOC+XLexpandertool-MAKITA18VLi-ionbattery-MAKITA18VLi-ionBatteryChargerInstructionManual-Lubricant-Cleaningbrush-Toolcase(graylatches)-Product Instruction Manual

AvailableAccessories:-EVERLOC+XLpowertoolstandardkit,Art.105733-001-EVERLOC+expanderheads(quickchange):

11/4in.,Art.105078-001;11/2in.,Art.105079-001;and2in.,Art.105080-001

-Largeratchetcutter,Art.131558-001

16

5. DESIGN CONSIDERATIONS

5.1 Pipe SizingThedesignandlayoutofthebuildinghot-andcold-waterdistributionsystemshallcomplywithacceptedplumbingengineeringpracticeandasperprevailinglocalcodes.

TheREHAUPEXaplumbingsystemconsistsofRAUPEXUVshieldPEXapipeandtheEVERLOC+compression-sleevefittingsystemandcanbedesignedandsizedperthefollowingmodelplumbingcodes:

- ICCInternationalPlumbingCode(IPC) - ICCInternationalResidentialCode(IRC) - IAMPONationalStandardPlumbingCode(NSPC) - IAPMOUniformPlumbingCode(UPC) - NRCCNationalPlumbingCodeofCanada(NPCC)

Inaddition,aproperlydesignedplumbingsystemshouldfollowtheengineeringprinciplesaspertheAmericanSocietyofPlumbingEngineers(ASPE)Plumbing Engineering Design Handbook Volume II orequivalent.

Forsizingasysteminresidentialandlightcommercialbuildings,usethewatersupplyfixtureunit(WSFU)methodtodeterminetherequiredload(GPM)andresultingpipesizeaspublishedinthemodelplumbingcodes.Alternatively,orinlargerbuildings,theuniformfrictionheadlossmethodcanbeutilized.

5.1.1 Standard Dimension RatioRAUPEXpipeisinaccordancetothedimensionalstandardsinASTMF876andCSAB137.5.RAUPEXiscoppertubesize(CTS)outsidediameter(OD)whichmeansthattheactualODofthepipeis1/8in.(3.18mm)largerthanthenominalsize.

Wallthicknessisdefinedbythestandarddimensionalratio(SDR).RAUPEXUVshieldpipeisSDR9,whichequatestotheoutsidediameterbeingapproximatelyninetimesthewallthickness.SincePEXpipehasathickerwallthancoppertube,theinsidediameter(ID)isslightlysmaller.However,sincePEXpipeisnotsusceptibletotheerosionandcorrosionissuesofcoppertube,plumbingsystemscanbedesignedathighervelocitieswhichallowforcomparablesizingofasystem.

5.1.2 Determining Friction LossThepressurelossfortheREHAUPEXaplumbingsystemcanbecalculatedusingtheREHAU PEXa Piping Systems Pressure Loss Tables (855.861)availableonlineontheREHAUResourceCenterorusingtheREHAULoopCADsoftwarepressurelosscalculatortool.

5.1.3 Velocity ConsiderationsThemaximumvelocityofwaterflow(feet/second–fps)intheplumbingsystemshouldbeconsideredwhensizingaREHAUPEXaplumbingsystem.Todeterminethepipesize,theWSFUloadcanbecorrelatedtoflowrate(GPM)fromtablespublishedinthemodelplumbingcodes.

Oncetheflowrateisdetermined,thepipecanbesizedbasedontheallowablemaximumvelocitiesperprevailinglocalcodes.

Thedesignercanusethefollowingtablesasaguideline:

Table 5.1: Maximum Velocity of Water Flow

Cold-Water

Piping

- Typicalplumbingcodesstatemaximumvelocityof8ft/sec

- REHAUrecommendsamaximumdesignvelocityof10ft/sec

Hot-Water

Piping

- Typicalplumbingcodesstatemaximumvelocityof5ft/sec

- REHAUrecommendsamaximumdesignvelocityof8ft/sec

Hot-Water

Recirculation

Return Piping

- Maximumvelocityof2ft/sec

- Maximumoperatingtemperatureof140°F(60°C)

Table 5.2: GPM per Pipe Size

Pipe SizeGPM

@ 2 fpsGPM

@ 5 fpsGPM

@ 8 fpsGPM

@ 10 fps

3/8in 0.6 1.6 2.5 3.2

1/2in 1.1 2.9 4.6 5.8

3/4in 2.3 5.7 9.1 11.3

1 in. 3.8 9.4 15.0 18.8

11/4in 5.7 14.0 22.3 28.1

11/2in 8.0 19.7 31.3 39.1

2 in 13.7 33.4 53.8 67.1

17

5.2 Equivalent Length of FittingsItiscommonpracticefordesignerstoconvertthepressuredropacrossfittingstoanaverageequivalentlengthofpipe.Theseequivalentlengthsareaddedtothetotalpipelength.Designerscanthencalculatetotalpressurelossusingthisadjustedpipingsystemlength.

Table 5.3: Equivalent Length of Fittings

CouplingsFitting Description Equivalent Length (ft)

3/8x3/8in.EVERLOC+LFBrassCoupling 1.1

1/2x1/2in.EVERLOC+PolymerCoupling 0.4

5/8x5/8in.EVERLOC+LFBrassCoupling 1.0



1x3/4in.EVERLOC+PolymerCoupling 2.7

1x1in.EVERLOC+PolymerCoupling 1.1



2x1in.EVERLOC+LFBrassCoupling 5.2

2x11/4in.EVERLOC+LFBrassCoupling 5.3

2x11/2in.EVERLOC+LFBrassCoupling 6.1

Tees

Fitting Description

Equivalent Length (ft)

RUN

Equivalent Length (ft) BRANCH

1/2x1/2x1/2in.EVERLOC+PolymerTee 0.8 4.4

1/2x1/2x3/4in.EVERLOC+PolymerTee - 4.1





3/4x3/4x1in.EVERLOC+PolymerTee - 6.8

1x1x1/2in.EVERLOC+PolymerTee 1.6 3.9

1x3/4x3/4in.EVERLOC+PolymerTee 2.8 6.5

1x3/4x1in.EVERLOC+PolymerTee 3.1 10.9

1x1x3/4in.EVERLOC+PolymerTee 1.2 6.7

1x1x1in.EVERLOC+PolymerTee 1.6 10.6

11/4x1x1in.EVERLOC+PolymerTee 3.8 9.7

11/4x11/4x1in.EVERLOC+PolymerTee 2.3 10.1



2x2x11/2in.EVERLOC+LFBrassTee 1.9 10.9

Elbows (PEX to PEX)Fitting Description Equivalent Length (ft)

1/2x1/2in.EVERLOC+PolymerElbow 1.9

5/8x5/8in.EVERLOC+LFBrassElbow 5.4


1x1in.EVERLOC+PolymerElbow 10.7



2x2in.EVERLOC+PolymerElbow 24.2

Elbows (PEX to transition)

Fitting DescriptionEquivalent Length (ft)

1/2x1/2in.CMaleor3/8in.CFemaleEVERLOC+LFBrassElbow 7.4

3/4x3/4in.CMaleEVERLOC+LFBrassElbow 7.4

1/2x1/2in.MPTEVERLOC+LFBrassDropEarElbow 7.6

3/4x3/4in.MPTEVERLOC+LFBrassDropEarElbow 7.5

Adapters (PEX to copper)


1/2x1/2in.CFemaleEVERLOC+LFBrassAdapter 2.3

1/2x1/2in.CMaleor3/8in.CFemaleEVERLOC+LFBrassAdptr 2.4

3/4x1in.CFemaleEVERLOC+LFBrassAdapter 3.9


3/4x3/4in.CMaleEVERLOC+LFBrassAdapter 2.6

1x1in.CFemaleEVERLOC+LFBrassAdapter 3.5

1x1in.CMaleEVERLOC+LFBrassAdapter 3.3





2x2in.CFemaleEVERLOC+LFBrassAdapter 7.0

2x2in.CMaleEVERLOC+LFBrassAdapter 6.9

Adapters (PEX to MPT/FPT)


1/2x1/2in.MPTEVERLOC+LFBrassAdapter 3.3

3/4x3/4in.FPTEVERLOC+LFBrassAdapter 2.8


3/4x1in.MPTEVERLOC+LFBrassAdapter 4.3

1x1in.FPTEVERLOC+LFBrassAdapter 3.6

1x1in.MPTEVERLOC+LFBrassAdapter 3.8



2x2in.MPTEVERLOC+LFBrassAdapter 7.3

18

5.3 Piping Layouts Mostpipinglayoutdesignsutilizesomeformofreducingteeinordertobranchfromamaintrunklinetosmallerpipediametersthatroutetofixturesandappliances.TheflexibilityofRAUPEXpipeallowsyoutoeasilyroutearoundobstaclesandreducethenumberoffittingsneeded.Multi-portteesfunctionlikereducingtees,butreducethenumberofconnectionpoints.Ingeneral,thebestsystemdesignsutilizetheflexibilityoftheRAUPEXpipeandminimizeconnections.

5.3.1 Tee and Branch - IncreasesinstallationspeedbytakingadvantageoftheflexibilityofPEXapipe - Reducespressureatthefurthestfixture - Similartotraditionalrigidpipeinstallationlayouts - Reduceshotwaterwaittime,comparedtoahome-runsystem

Parts list: - Reducingtees - Straighttees - Straightorcoiledpipe

Fig. 5.1: Tee and branch piping layout

5.3.2 Multi-port Tee - Minimizesnumberofconnections - Combinesteeandbranchandhome-runconcepts - Systemsarepressure-balancedateachmanifold - Reduceshotwaterwaittime,comparedtoahome-runsystem

Parts list: - Flow-throughmulti-porttees - Closed-endmulti-porttees - Straightorcoiledpipe

Fig. 5.2: Multi-port tee piping layout

5.3.3 Home-run - Generallyforresidentialinstallations - Eliminatesmostfittings - Balancespressuretoallfixtures - Increaseshotwaterwaittime,comparedtoteeandbranchandremotemulti-portdesigns - Usesmorepipe - Mayrequiremoreholestobedrilledinjoistspaces

Parts list: - Multi-porttees - Straightorcoiledpipe

Fig. 5.3: Home-run piping layout

19

5.4 Thermal Expansion and ContractionWhenthermalexpansionisanticipated,pipemovementshouldbecontrolledtoavoidchangesthatcoulddamagethepipingsystem.Anchoringanduseofexpansionloopsmaybeusedtoaccomplishthis.Allowingforcontrolledexpansionandcontractioninmultiplepartsofapipingsystemisanacceptedmeansofpreventingaddedstressesinotherpartsofthesystem.

RAUPEXpipingsystemsexhibitahigherexpansionandcontractionratewhensubjectedtochangesintemperatureascomparedtometallicpipingsystems.Becauseofitslowermodulusofelasticity,RAUPEXpipeislessrigidthanmetallicpipinganddevelopslessforcethanmetallicpipewhenexposedtotemperaturechanges.

5.4.1 Calculating Thermal Expansion of RAUPEX PipeWhenapipeisanchoredatoneendbutcanotherwisefreelymoveintheaxialdirection,anincreaseintemperaturecausesthepipetoincreaseinoveralllength.Adecreaseintemperaturecausesadecreaseinlength.

Thefollowingequationpredictsthenetexpansion/contractioninthelengthofafullyunrestrainedpipethatoccursinconsequenceofagivenchangeintemperature:

(1)

where,ΔL=changeinpipelength,in.α=coefficientoflinearexpansion/contraction,in/ft°FL=initialpipelength,in.ΔT=changeinpipetemperature,°FNote:SeeTable3.1forcoefficientoflinearexpansion

5.4.2 Calculating L-bend and U-bend for RAUPEX PipeRAUPEXpipewillexpandandcontractwhenheatedorcooledduetoachangeinwatertemperatureorambienttemperature.ThermalexpansionofRAUPEXpipemustbeconsideredinthedesignandinstallationofthepipingsystem.Fixedanchorpoints,guidesandexpansionloopsshouldbeutilizedtoaccountfortheexpansionandcontractionofthepipetopreventanydamagetothepipingsystem.

Fig. 5.4: L-bend and U-bend

CalculationofthelengthofoffsetforanL-bendorwidthandheightofaU-bendcanbedeterminedasfollows,whereL=lengthofoffsetlegforL-bend(ft),perASHRAE2016 Chap 46 Pipe, Tubes and Fittings

(2)

D=actualpipeoutsidediameter(in),sourceforRAUPEXisTable3.2E=modulusofelasticity(psi),sourceforRAUPEXisTable3.1C=constant,144(in²/ft²)S

A=allowablestressrange

FP=FixedPoint

SP=SlidingPoint(Guide)

𝐿 = �3𝛥𝐷𝐸𝐶𝑆𝐴

20

andΔ=anchor-to-anchorthermalexpansionorcontraction(in)

(3)

where,α=coefficientoflinearexpansion([in/[ft°F]),sourceforRAUPEXisTable3.1dT=temperaturedifferential(°F)L

FP=singleplanelengthbetweenfixedpoints(anchors)(ft)

ThewidthofaU-bendiscalculatedwiththefollowingequation,whereW=widthofU-bend(ft),perASHRAE2016 Chap 46 Pipe, Tubes and Fittings

(4)

TheheightofaU-bendiscalculatedwiththefollowingequation,whereH=heightofU-bend(ft),perASHRAE2016 Chap 46 Pipe, Tubes and Fittings

(5)

5.4.3 RisersAlwayscomplywithprevailinglocalcodesregardingtheuseofPEXpipeinriserapplications.RAUPEXshouldbesupportedverticallyeveryfloor(notexceeding10ft[3.048m]perfloor).Apipeguideshouldbeusedmidwaybetweenverticalsupports.Themid-storyguidesdonotsupporttheweightofthepipe;theykeepitfrommovinghorizontallywhenthepipeexpands.

Note:ThesearetheminimumrequirementsoftheUMC,UPC,IMC,IPCandIRC.

Whenitcomestohydronicrisers,thegoalistocontrolexpansionandcontractionforcesinsidethewallcavityandupholdtheintegrityofthefirestop.Toaccomplishthis,ariserclampshouldbeplacedatthefloorandbaseofeachlevel,alongwithamid-storyguide.Pipingrunsmustcomplywithsupportspacingasdefinedbytheprevailinglocalcodes.

5.5. Installation in Fire-rated AssembliesIncommercialandresidentialapplications,fire-ratedwallandfloor/ceilingassembliesareanessentialcomponentoftheoverallfireresistantconstructionforthebuilding.Themodelbuildingcodesdefinetherequirementsfortheseratedassemblies,whichincludesthetypeofconstruction(framedorconcrete),thefireratingoftheassembly(2hours,forexample),andloading.

Forplumbinginstallations,itiscommontoroutethepipingthroughtheseratedassemblies.Inthiscase,themodelbuildingcodesrequirethattheinstalledcomponentsdonotdiminishtheoverallratingoftheassembly.Therefore,REHAUhascompletedaseriesoffiretestswithULandULCtoevaluatetheperformanceofREHAUpipinginthesetypesofinstallations.

Basedonthisextensivetesting,ithasbeendemonstratedthattheinclusionofRAUPEXpipeshouldnotadverselyaffecttheoverallfireratingoftheassembly.RAUPEXpipeisULandULCListedforinstallationinfire-ratedassemblieswhichincludesreinforcedconcreteslabs,wood-framedfloor/ceilingassemblies,framedbearingwalls,andframednon-bearingwalls.ThislistingcoversUVshieldpipesinsizes3/8through2in.

ThefireresistancelistingsforRAUPEXpipehavebeentestedtoandmeetthefollowingstandards:-ANSI/UL263,Fire Tests of Building Construction and Materials -CAN/ULC-S101,Standard Methods of Fire Endurance Tests of

Building Construction and Materials

ThefollowingdesignlistingscanbefoundontheULandULConlinecertificationsdirectory(www.ul.com and www.ulc.ca).

Table 5.4: Fire-rated Assembly Design Listings

Assembly Description UL Design No. ULC Design No.

ReinforcedConcreteSlab No.K917 No. J900

WoodFramedFloor/CeilingAssembly No.L588 No.M516

CombustibleBearingWall No.U383 No. W316

CombustibleNon-bearingWall No.V461 No.W458

WhenusingRAUPEXpipeinthesetypesofapplications,thespecify-ingengineeranddesignershouldevaluatethedesignlistingstoensureprevailinglocalcoderequirementsaremet.Inadditiontheauthorityhavingjurisdictionshouldreviewandapprovethedesignbeforeinstallation.

5.5.1 Firestop SystemsInaccordancewithmodelbuildingcodes,whenRAUPEXpipepenetratesthroughafire-ratedassembly(i.e.,floor,ceiling,wall)thepenetrationmustbeprotectedbyanapprovedthrough-penetrationfirestopsystem.Thisfirestopsystemshallbetestedinaccordance

𝛥 = 𝛼 ∗ 𝑑𝑇 ∗ 𝐿𝐹𝑝

𝑊 =𝐿5

𝐻 = 2𝑊

21

withoneorallofthefollowingstandardsandlistedbyanindependentthird-partylistingagencysuchasUL,ULCorITS(WarnockHersey).Thefirestopsystemshallmeetalllocalcoderequirementspriortoinstallation.

Mostcommonfirestopsystemstandardsare:-ASTME814,Fire Tests of Through-Penetration Firestops-UL1479,Fire Tests of Through-Penetration Firestops-CAN/ULCS115,Tests of Fire Resistance of Building Joint Systems

SeveralsuchsystemsarecommonlyavailableacrossNorthAmerica.InordertochooseanapprovedfirestopsystemforeachspecificapplicationwhereaPEXpipepenetratesafire-ratedassembly,thefollowinginformationmustfirstbeknown:-NominalsizeofPEXpipepenetratingthefire-ratedassembly-NumberofPEXpipespenetratingthroughoneopening-Typeofassemblybeingpenetrated(i.e.floor,wall,ceiling)-Constructionoffire-ratedassembly(i.e.wood,concrete)-The"F"and"T"ratingsofthefire-ratedassembly

Fig. 5.5: RAUPEX pipe is fire-stopped at both points of entry through the assembly

Todetermineaproductthatislocallyavailableandcorrectfortheassemblytype,REHAUrecommendscustomerscontactlocalfirestopproductsupplierstodeterminewhichoftheirfirestopproductsarelistedfortheintendedassemblywithPEXpipe:

5.5.2 Installation in Plenum Space (United States)Aplenumisdefinedasanenclosedportionofthebuildingstructurethatisdesignedtoallowairmovement,therebyservingaspartofanairdistributionsystem.Plenumscanserveassupply,return,exhaustandventilationportionsoftheairdistributionsystem.

TheInternationalMechanicalCode(IMC)andUniformMechanicalCode(UMC)requirethatcombustiblematerialsinstalledwithinairplenumshaveaflamespread(FS)indexofnotmorethan25,andasmokedeveloped(SD)indexofnotmorethan50.Thesenumbersdonotcontainunits,andareusedasindex(comparative)ratingsofhow

quicklybuildingmaterialsburnandhowmuchsmokeisdevelopedwhentheyburn.Pipesthatmeettheserequirementsaresometimessaidtohavea"plenumrating."

Theflamespreadindexandthesmokedevelopedindexaremeasuredduringastandardizedlaboratorytestthatburnscombustiblepipeandmeasuresthespeedofflamespreadandvolumeofsmokedeveloped.

TheIMCandUMCspecifythattheflamespreadindexandthesmokedevelopedindexofamaterialaretobedeterminedbasedononeofthefollowingstandards:-ASTME84,Standard Test Method for Surface Burning Characteris-

tics of Building Materials, or-UL723, Test for Surface Burning Characteristics of Building

Materials

ThefollowingsizesofRAUPEXUVshieldpipearelistedwithaflamespreadindexofnotmorethan25andasmokedevelopedindexofnotmorethan50.

Table 5.5: Flame Spread/Smoke Developed ≤ 25/50 Bare Pipe

Pipe Description

ASTM E84 18 in. spacing

FS/SD

1/2in.RAUPEXUVshield FS≤25/SD≤50

Table 5.6: Flame Spread/Smoke Developed ≤ 25/50 Bare Pipe with REHAU Galvanized Support Channel

Pipe Description

ASTM E84 Galvanized support channel

FS/SD

3/4-2in.RAUPEXUVshield FS≤25/SD≤50

Table: 5.7: Flame Spread/Smoke Developed ≤ 25/50 with 1/2 in. Fiberglass Insulation

Pipe Description

ASTM E84 Pipe wrapped in 1/2 in. fiberglass insulation

FS/SD

≤2in.RAUPEXUVshield FS≤25/SD≤50

22

RAUPEXUVshieldpipeshavealsobeenevaluatedtoUL2846forplasticwaterdistributionplumbingpipeforvisibleflameandsmokecharacteristics.WhencoveredwithUL-classifiedpipeandequipmentcoveringmaterial,RAUPEXUVshieldpipeexhibitspeakopticaldensitiesof0.5orless,maximumaverageopticaldensitiesof0.15orless,andmaximumflame-propagationdistancesof5ft(1.5m)orless.-UL2846,Fire Test Of Plastic Water Distribution Plumbing Pipe For

Visible Flame And Smoke Characteristics

Table 5.8: Optical Density and Flame Propagation with UL-classified Pipe and Equipment Covering Material

Pipe Description

UL 2846Pipe covered with UL Classified Pipe and

Equipment Covering Material


5.5.3 Installation in Plenum Space (Canada)TheNationalBuildingCodeofCanada2010(NBCC-2010)requiresthatcombustiblematerialsinstalledwithinairplenumshaveaflamespread(FS)ratingofnotmorethan25,andasmokedeveloped(SD)classificationofnotmorethan50.Thesenumbersdonotcontainunits,andareusedasindex(comparative)ratingsofhowquicklybuildingmaterialsburnandhowmuchsmokeisdevelopedwhentheyburn.Pipesthatmeettheserequirementsaresometimessaidtohavea"plenumrating".

TheNBCC-2010specifiestheflamespreadratingandthesmokedevelopedclassificationofamaterialistobedeterminedbasedonthefollowingstandard:-CAN/ULCS102.2-2007,Standard for Surface Burning Characteris-

tics of Flooring, Floor Covering and Miscellaneous Materials and Assemblies (Canada)-Theengineer/installerisresponsibleforverifyingprevailinglocalcodesaremetpriortoinstallation.

Basedonthistesting,thefollowingsizesofRAUPEXUVshieldpipeareproventohaveaflamespreadratingofnotmorethan25andasmokedevelopedclassificationofnotmorethan50.


Pipe Description

CAN/ULC S102.2-200718 in. spacing

FS/SD

3/8to3/4in.RAUPEXUVshield FS≤25/SD≤50

Table 5.10: Flame Spread/Smoke Developed ≤ 25/50 with 1/2 in. Fiberglass Insulation

Pipe Description

CAN/ULC S102.2-2007pipe wrapped in 1/2 in.

fiberglass insulation 18 in. spacing

FS/SD

1to2in.RAUPEXUVshield FS≤25/SD≤50


Pipe Description

CAN/ULC S102.2-2010No spacing requirements

FS/SD

3/8to1/2in.RAUPEXUVshield FS≤25/SD≤50

Table 5.12: Flame Spread/Smoke Developed ≤ 25/50 with Insulation

Pipe Description

CAN/ULC S102.2-2010pipe wrapped in 1/2 in.

fiberglass insulation or 1/2 Armaflex insulation. No spacing requirement

FS/SD


5.6 Overhead InstallationsSuspendedsectionsofPEXpipeneedtobeinstalledusingmethodstoensurethepipedoesnotsag.StandardCopperTubeSize(CTS)hangers,includingclevisandloophangers,canbeusedtosupportsuspendedsectionsofPEXpipe.

Thehangersystemmustbestrongenoughtosupportthepipeanditscontents.AllsupportsthatcomeincontactwithRAUPEXpipemustbeapprovedmaterialsthatarecompatiblewiththepiping.

RAUPEXwillexpandandcontractwhenheatedandcooled.Itisimportanttoincorporatethiswhendesigningpathwaysandsupports.RAUPEXmaybesupportedusingeitherafixedpointorslidingsupportdevice.Fixedsupportpoints,suchaslockingclips,talondrivehooksandsinglenailclamps,willrigidlyholdRAUPEXinplaceand

23

minimizethemovementofthepipeduringexpansionorcontraction.ThesearetypicallyinstalledonbothsidesofEVERLOC+fittinglocations.Slidingsupportdevices,liketheisolatingsuspensionclamps,willpermitthepipetoslidewithinthesupportduringexpansionandcontraction.

Whenchoosingsupports,ensuretheywillnotcut,scratchordamagethepipe.Ifusingmetalsupports,makesuretherearenosharpedgesthatcoulddamagethepipe.

RAUPEXpipe3/8to1in.diametermustbesupportedwithamaximumspacingof32in(80cm)horizontallyand10ft(3m)vertically.RAUPEXpipelargerthan1in.diametermustbesupportedwithamaximumspacingof48in(120cm)horizontallyand10ft(3m)vertically.Alwayscomplywiththeprevailinglocalcodeforsupportspacingintervals.

REHAUgalvanizedsteelsupportchannelcanbeusedtogaingreaterspacingbetweensupporthangers.ThegalvanizedsteelsupportchannelisspecificallydesignedtosupportREHAURAUPEXpipeinsizes3/4to2in.

Fig. 5.6: REHAU galvanized steel support channel

TheprofileofthegalvanizedsupportchannelismadesotheRAUPEXpipewillsnapintothesupportchannelwithoutrequiringadditionalfasteningmethodstoholdthepipeinplace.Theresultisarigidpipematrixwithadequatestiffnesstobesupportedinoverheadandexposedapplications.Thepipematrixissupportedusingtypicalmechanicalclevishangersspacedsimilartometallicpipeinstallations.Allpiecesofgalvanizedsteelsupportchannelmusthaveaminimumoftwosupports/hangers.

- Extendsupportaminimumof1in(25mm)pasthanger - EnsureadequateRAUPEXoverhangpastsupportchanneltoallowinstallationofEVERLOC+fitting,ifrequired - Use3/8in.threadedrodtosuspendthesupportchannelwithamaximumspacingbetweensupportsof8ft(2.4m).

Note:Alwayscomplywiththeprevailinglocalcodesforsupportspacingintervals.

Fig. 5.7: RAUPEX pipe in overhead installation

5.7 Water QualityRAUPEXpipeandEVERLOC+compression-sleevefittingsarethird-partytestedandcertifiedforusewheredrinkingwaterqualitiesmeettherequirementsoftheEPANational Primary Drinking Water RegulationsandtheGuidelines for Canadian Drinking Water Quality byHealthCanada.

TheU.S. Safe Drinking Water Actandthe Lead and Copper Rule requirepublicwatersupplierstoprovidenon-corrosivedrinkingwatertocustomers.However,irrespectiveofthematerialused,inrareandisolatedcases,corrosioncanoccurevenwhenthewaterqualitylevelsarewithinthepermissiblerangesetforthbytheEPANational Primary Drinking Water Standards andtheGuidelines for Canadian Drinking Water QualitybyHealthCanada.Someinfluenc-ingfactorsoncorrosionbehaviorarewaterdisinfectionprocesses,pHlevels,chloridecontent,sulfatecontentandtheuseofanin-housewatertreatmentsystem.

Toevaluatetheprobabilityofcorrosionforplumbingcomponentsinapotablewatersystem,thelicensedinstallingcontractormusthavepracticalexperiencewithinthegeographicregionofintendeduse.Consultationwiththelocalplumbingauthorityandlocalwaterauthorityregardingtheseexperiencesshouldoccurbeforetheselectionandinstallationofpotableplumbingcomponents.

Thecorrosivityofwaterdependsonamultitudeofinterdependentvariablesandtherearenosimpleequationsorindicesforpredictingthecorrosionpotential.Itmustbeunderstoodthatcorrosionisaphenomenonassociatedwiththebehaviorofsystemcomponentsintheiroperatingenvironment.Everymaterialhasauniquetendencytocorrodeornotcorrodeinasimilarenvironment.However,withlocal

24

knowledgeofspecificwatercharacteristicsandtheenvironmentinwhichthesystemcomponentsareinstalled,thedesignengineerandinstallingcontractorcanmakepropermaterialselectionsanddeterminepropersystemoperatingparameterstominimizethepotentialforcorrosionofthepipingsystem.

Iflocalconditionsareknowntocausecorrosionissues,awaterqualityexpertwithcorrosionexperienceshouldbeconsulted.

InorderfortheREHAU PEXa Limited Warranty toapply,productsmustnotbesubjectedtodamageorwearcausedbyabnormaloperatingconditionsandtheproductsmustnotbeexposedtoharmfulchemicals,aggressivewaterconditionsoranyexternalinfluencesthatcausedamagetotheproducts.

5.8 Hot Water RecirculationBenefitsofhotwaterrecirculation: - Reducesthetimeyouhavetowaittodeliverhotwatertofixturesthatarefarfromthehotwaterstoragetank,whichreduceswaterwaste - HelpspreventstagnantsystemconditionsinthepipingnetworkthatcanallowforLegionellabacteriagrowth

Plumbingfixturesthatrequirehotwaterarenotalwayslocatedincloseproximitytothehotwaterstoragetank.Hotwaterrecirculationsystemscirculatehotwaterthroughoutthebuildingandbacktothestoragetanktomaintainwarmerwatertemperaturesclosertothehotwaterfixtures.Thesesystemsaimtoreducethewaittimeforhotwaterateachfixture.

InordertomeettherequirementsoftheInternationalPlumbingCodeSection607.2: - 607.2, Hot or tempered water supply to fixtures.Thedevelopedlengthofhotortemperedwaterpiping,fromthesourceofhotwatertothefixturesthatrequirehotortemperedwater,shallnotexceed50ft(15m).Recirculatingsystempipingandheat-tracedpipingshallbeconsideredtobesourcesofhotortemperedwater. - 607.2.1,Circulation systems and heat trace systems for maintaining heated water temperature in distribution systems.ForGroupR2,R3andR4occupanciesthatarethreestoriesorlessinheightabovegradeplane,theinstallationofheatedwatercirculationandtemperaturemaintenancesystemsshallbeinaccordancewithSectionR403.5.1oftheInternationalEnergyConservationCode.

Aproperlycontrolledhotwaterrecirculationsystemwithwell-insulat-edpipingiskeytomeetcoderequirementsandavoidexcessenergyuse.Tominimizeenergywaste,domesticrecirculationpumpcontrolsareimportant.Energycanbesavedwithrecirculationpumpcontrols:

- Simpletimercontrolsoroccupancysensorsthatonlyrecirculatehotwaterwhenthebuildingisoccupied - Temperature-basedcontrols,typicallyanaquastat,thatturnonthepumpwhenthetemperaturedropsbelowacertainthresholdcanfurtherassistintherecirculationloop.

- Pressure-changebasedcontrolsthatonlyspeedupwhenthedemandforhotwaterincreases

5.8.1 Legionella ConsiderationsAccordingtotheCenterforDiseaseControlandPrevention,Legionellaisatypeofbacteriumfoundnaturallyinfreshwaterenvironments,likelakesandstreams.Itcanbecomeahealthconcernwhenitgrowsandspreadsinhuman-madewatersystems.Thebacteriacanmultiplyinwarm,stagnantwaterandaffectshumanswhendropletsofwatercontaininghighconcentrationsofthebacterialareinhaled.Thebacteriabeginstodiewhenthewatertemperatureiselevatedabove120°F(50°C),butthedisinfectionismoreeffectiveathighertemperatures.(www.osha.gov/dts/osta/otm/legionnaires/faq.html)

Domestichotwatersystemdesignisusefultopreventthegrowthofthisbacteriawiththesetwomethods: - Minimizingdead-legdistances(thevolumeofwaterthatisbetweeneitherahotwaterstoragetankorarecirculationlineandthefixture)iscrucialtosystemdesign.Whilethe2015IPC Section 607.2mayallowforupto50ft(15m)ofpipebetweenthesetwopoints,reducingthatdistancewillreducethevolumeofwaterthatcanstagnateifthefixtureisunusedforalongperiodoftime.Stagnatewaterthatisn’tregularlythermallydisin-fectedmayallowLegionellabacteriatogrow. - Increasingthetemperatureofthewaterspeedsupthethermaldisinfec-tiontimeofLegionellabacteria.Youmustalsoavoidscaldingrisksassociatedwithmaximumdeliverablewatertemperaturesforoccupants,determinedbytheauthorityhavingjurisdiction.

Thereisn’tacomponentmanufacturerorportionofaplumbingsystemthatbearsalltheresponsibilityforLegionellagrowthprevention.ThePlasticsPipe Institute Recommendation Against Mixing Hydronic Heating Water with Potable Water, Recommendation E, 2016isagoodsourcefornon-manu-facturerspecificLegionellaconcerns.

5.9 Water HammerWaterhammer,alsocalledhydraulicshock,commonlyoccurswhenavalveclosessuddenlyattheendofapipelinesystem,andapressurewavepropagatesinthepipe,creatingvibrationandnoise.

Whilethesestatementsmaybetrueformetallicpipingsystems,theabilityofPEXpipetoabsorbshockeliminatestheneedforwaterhammerarresters,ifallowedbyprevailinglocalcodes.

25

6. INSTALLATION CONSIDERATIONS

6.1 Local Code ApprovalsTheinstallationoftheREHAUPEXaplumbingsystemforuseindomesticplumbingsystemsmustbeinaccordancewiththeguide-linesthatarepresentedinthistechnicalguide.Prevailinglocalcodeswherethesystemisbeinginstalledmustbeobserved.Wherelocalcodeandthistechnicalguideconflicteachother,localcodeshouldprevail.However,itistheresponsibilityofthedesignerandinstallertodiscussanyvariationwithREHAUEngineeringtoensureanyvariationwillnotadverselyaffecttheperformance,operationorlifeexpectancyofthesystemanditscomponents.

6.2 Packaging, Transport, Handling and Storage

6.2.1 RAUPEX Pipe PackagingRAUPEXpipecoilsareshippedincardboardboxestoprotectthemfromsunlight,rain,dirtandotherhazards.StraightlengthsofRAUPEXpipearepackagedandshippedinblackpolyethylenebags.Keeppipeintheoriginalpackaginguntilitisrequiredforinstallation.Returnunusedpipetothepackaging.

Avoidthefollowing:-Draggingpipeoverroughobjects-Contactofpipewithpetroleumproductssuchasoil,gasoline,paintthinner-Exposureofpipetosolderingoranyopenflame-Excessiveorpermanentexposuretosunlight

6.2.2 EVERLOC+ Fittings PackagingEVERLOC+fittingsandsleevesareshippedincardboardboxestoprotectthemfromsunlight,rain,dirtandotherhazards.Keeptheproductsintheoriginalpackaginguntiltheyarerequiredforinstalla-tion.Returnunusedproductstothepackagingforstorage.

Fittingsandsleevesmustbehandledwithcare.Ataminimum,avoidthefollowing:-Storingloosefittingsintoolboxes-Contactwithoiloroilyproductssuchasgasoline,paintthinner,gluesorsolvents-ExposureofpolymerfittingsandPEXasleevestosolderingoranyopenflame-ExcessiveorpermanentexposuretosunlightofpolymerfittingsandPEXasleeves

6.3 Uncoiling PipeForbestresultswheninstallingRAUPEXpipefromacoil,useaREHAUapproveduncoilingdevice.Thiswillallowthepipetolayflat(nottwisted)wheninstalled.Twistingthepipemayplacestressonthepipeafterinstallation.

RAUPEXmaybetakenfromacoilwithouttheuseofanuncoilingdevice.Whenusingthismethod,besuretorollthepipefromthecoil.Donotlaythecoilflatonitssideandpullthepipeupoverthesideofthecoilasthiswilltwistthepipe.

Fig. 6.1: Uncoiling RAUPEX pipe

6.4 Bending PipeRAUPEXpipemaybebent,withandwithouttheuseofapipebendsupport.TheminimumbendradiusforRAUPEXinastandardinstallationisfivetimestheODofthepipe.

RAUPEXmayalsobeheatedtoachieveaminimumbendradiusofthreetimestheODofthepipe.Aheatgunmaybeusedtoheatthepipe.HeatRAUPEXandbendslowly.OncetheRAUPEXisbent,removetheheatsourceandsecuretheRAUPEX.AvoidoverheatingRAUPEX(browndiscoloration)anddonotapplydirectflametoRAUPEXtoheatit(fromasolderingtorch,forexample).

Table 6.1: RAUPEX Bend Radius

Typical Minimum Bend Radius in (mm)

Pipe Size Typical 8X OD Min. Cold 5X OD Min. Heated 3X OD

3/8in 4.0(102) 2.500(64) 1.500(38)

1/2in 5.0(127) 3.125(79) 1.875(48)

5/8in 6.0(152) 3.750(95) 2.250(57)

3/4in 7.0(178) 4.375(111) 2.625(67)

1 in 9.0(229) 5.625(143) 3.375(86)

11/4in 11.0(279) 6.875(175) 4.125(105)

11/2in 13.0(330) -- --

2 in 17.0(432) -- --

26

Bend Radius90

Fig. 6.2: Bend radius of RAUPEX pipe

6.5 Distance Between Fittings AminimumdistancebetweenEVERLOC+fittingsisrequiredtoensurethefittingsarenotdamagedduringtheexpansionprocessbytheinstallationtools.Aminimumpipelengthof3timesthelengthofsleeveisrequiredbetweenfittingsforproperinstallation.

A3A

EVERLOC+ PEXaCompression Sleeve

RAUPEX Pipe

EVERLOC+ Fitting

Fig. 6.3: Required minimum distance between fittings

6.6 Pipe ProtectionPlacepipeprotectionaroundRAUPEXpipetopreventabrasionwhenpassingthroughthebuilding'sframework.

WhenRAUPEXpipepassesthroughstuds,walls,floorplates,joistsandotherstructuralmembers,caremustbetakennottodamagethepipe.

Protectionisnotrequiredforinstallationinwoodstuds,walls,floorplatesorjoistsifthefollowingprovisionsaremet: - Theholeisatleast1/4in(6mm)largerthantheoutsidediameter(OD)ofthepipe-Thepipeisfreetomoveduringexpansionandcontraction-Theholeisclean(e.g.,freeofsplinters,burrsandroughedges)-Theholeissupportingonlytheweightofthepipe(withfluid),andnotamechanicaldevice

-Theholehassmooth,non-abrasiveinteriorsurface(e.g.,bushing)-Prevailinglocalcodesallowsuchpractice

UseofPEprotectionsleeveorotherapprovedsupportdeviceisrequiredforRAUPEXpipewhenpassingthroughholesinsteel,concreteormasonrywalls,joistsandotherstructuralmembers.

WhenRAUPEXpiperunsthroughanyabrasivematerial,oraholethatdoesnotallowfreemovement,itmustbeprotectedbyPEprotectionsleeveoranotherapprovedinstallationaccessory,suchassuspensionclampsorisolators.

Fig. 6.4: Isolation suspension clamps Fig. 6.5: Pipe isolator

Fig. 6.6: PE protection sleeve

RAUPEXpipeisrecommendedforinstallationdirectlywithinorbelowaconcreteslab.TheuseofPEprotectionsleeveorPVCbendguidesatslabpenetrationsisrecommended.

Fig. 6.7: Slab penetration

27

6.7 InsulationThermalconductivityofRAUPEXpipeismuchlowerthanthatofmetallicpipes.Insulationcanbeinstalledtofurtherenhancethisproperty,todecreaseenergyusage,andmaintainwatertemperatureinsidethepipe.BecauseofthethermalpropertiesofRAUPEXpipe,itisalsolesssusceptibletocondensationorsweatingoncoldwaterlines.

Insulationcanbeinstalledoncoldwaterlinestoimproveresistancetocondensationorbettermaintaininternalwatertemperature.Itisalsorecommendedtoinsulatepipinginunconditionedspacesandhighmoistureareas.Alwayscomplywithprevailinglocalcodes.

6.8 Installation Below-grade, in-slabRAUPEXmaybeinstalleddirectlywithinorbelowaconcreteslab.Thisisespeciallyusefulinslab-on-gradeconstruction.RAUPEXpipesencasedwithinconcreteslabsarenotrequiredtobesleeved.

ToprotectRAUPEXpipefromabrasionwhereitpassesthroughtheconcrete,theuseofPEprotectionsleevesorPVCbendguidesatallslabpenetrationsisrecommended.

ContinuoussleevingofRAUPEXplumbingpipesburiedbeloworwithinaconcreteslabisnotprohibited,however,insuchcasesthefollowingprecautionmustbefollowed: - WhenRAUPEXpipesarecontinuouslysleevedbeloworaboveaslab,thespacebetweenthepipeandthesleevingmustneverbefilledwithanyliquidchemical,includingpesticidesortermiticides. - Theannulargapbetweenthepipesattheendsshouldbefilledwithsiliconeorpolyurethaneexpandingfoamtohelppreventpathwaysforpestsandthemistakenapplicationofharmfulchemicalsintothespacebetweenthepipeandthesleeving. - UseonlysealantsthatarecompatiblewithRAUPEXpipe.

WARNING - ApplicationofpesticidesortermiticidesbetweenRAUPEXpipeandsleevingisstrictlyprohibited.Permeationofpesticidesortermiticidesmayoccurthroughthepipewallresultinginseriousinjuryordeath. - RAUPEXpipesforplumbingapplicationsshallnotbeinstalledincontaminatedsoilsorimmersedinliquidchemicals.Donotdirectlysprayonoralloworganic(petroleum-based)chemicalssuchas,petroleumdistillates,termiticidesorpesticidestocomeintocontactwithRAUPEXpipes.Permeationoftheseharmfulchemicalsmayoccurthroughthepipewallresultinginseriousinjuryordeath.

Fig. 6.8: Continuous sleeve installation

Fig 6.9: Slab penetration protection

ApressuretestonRAUPEXpipesbeforeencasinginconcreteisrecommendedtoensureRAUPEXpipeandconnectionsareleakfree.Installersshouldmaintaintestpressureonthesystemduringfurtherconstruction,wherepractical.Airtestingispermitted.Ifawater(hydrostatic)testisused,thewatermustbeprotectedfromfreezing.DetailedpressuretestingprocedureisoutlinedinSection6.17.2.

6.9 Fixture Connection Common Components

6.9.1 Drop Ear ElbowsTheEVERLOC+LFbrassdropearelbowprovidesarigid90°bendandtheabilitytosecure1/2or3⁄4in.RAUPEXpipewhereitexitsastudwallorconnectstoashowerhead. Fig. 6.10: Drop ear elbow

6.9.2 Copper Ells TheEVERLOC+tub/showerdiverterellprovidesa90°transitionfromtubandshowervalvetoRAUPEXpipe.

TheEVERLOC+closed-endstuboutellprovidesa90°transitionfromRAUPEXpipetocopper.Useclosed-endstuboutellsatthefixturetoexitfromthewall.

28

TheEVERLOC+straightcopperstubsprovideatransitionfromRAUPEXpipetocopper.Useclosed-endstuboutellsatthefixturetoexitfromthewall.

Fig. 6.11: EVERLOC+ copper ells

6.9.3 EVERLOC+ ValvesEVERLOC+straightandanglestopvalvesareintendedforusewithpoint-of-usefixtures.

BecauseRAUPEXpipehasthesameoutsidediameterasstandardcopperpipe,youcanusestandardcompressionstraightandanglestopvalveswithstiffenerstoconnecttoRAUPEXpipe.

Fig. 6.12: EVERLOC+ Valves

6.9.4 Other EVERLOC+ Transition FittingsREHAUalsooffersfollowingconnectiontypesfortheEVERLOC+fittingswhenmakingconnectionstofixtures.RefertotheREHAU Sustainable Building Technology Catalogforacompletearticlelisting.

- EVERLOC+90°Elbows,PEXtoCopper(CMaleandCFemale) - EVERLOC+Adapters,PEXtoCopper(CMaleandCFemale) - EVERLOC+MPTAdapters,PEXtoMPT - EVERLOC+FPTAdapters,PEXtoFPT - EVERLOC+LFBrassSwivelAdapters,PEXtoNPS

6.10 Water Heater Connections In accordance to Uniform Plumbing Code, Section 604.13:PEXtubingshallnotbeinstalledwithinthefirsteighteen(18)inches(457mm)ofpipingconnectedtoawaterheater.Aminimumof18in(45cm)ofmetallictransitionpipingmustbeusedforbothofthedirectconnec-tionstowaterheaterconnections.Corrugatedmetalwaterheaterconnectorpipesofcopperorstainlesssteelarethetypicalmaterialsforthisapplication.ThisappliestoallPEXfittingsystemsandalltypesofwaterheaters(electric,fossilfuel,andindirect-fired)includingstoragetanktypeandtanklesstype(alsoknownasdemandorinstantaneous)waterheaters.

However,therearejurisdictionsthatpermitdirectconnectionofPEXtoanelectricwaterheater.Inthesecases,RAUPEXpipeandEVERLOC+fittingsmaybedirectlyconnected.

Inaddition,whenconnectingRAUPEXpipetoatanklesstypeorpoint-of-usewaterheater,connectionsshallfollowwaterheatermanufacturer’sinstallationinstructions.

Fig. 6.13: Water heater connection

6.11 Supporting RAUPEX PipeRAUPEXpipeshouldbeinstalledsothatitisalignedandstable. - StandardCopperTubeSize(CTS)hangers,includingclevisandloophangers,canbeusedtosupportsuspendedsectionsofpipe. - Suspendedsectionsofpipeshallbeinstalledsothatthereisnosaginthepipesystem. - AllmaterialsincontactwiththepipeshallbeapprovedforusewithRAUPEXpipe. - Ensuresupportswillnotcut,scratchordamagethepipe.

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- Suspendedinstallationsinwood-frameconstructioncanutilizestrutchannelhangingwithall-threadasthesupportdevicewiththeappropriateclampstosecurepipetothestrut.Whenclampingpipe,besurenottodeformthepipewiththeforceoftheclamp. - Installationsinsteel-frameconstructioncanbedonesimilarly,butcanalsousebeamclampstosecuretheall-threadtosteelI-Beams. - Steeljoistspacecanbeusedasthesupportmethod.

Whennotinstallinginsuspension,othersupportmechanismsforRAUPEXpipecanbeused.Theseincludesinglenailhooks,pipesupportbends,talondrivehooksandlockingclips.Thesecanalsobeusedforsmallerbranchrunsofpipeaswellastoassistinmakingbendstoconnecttofixtures.

RAUPEXpipe3/8to1in.diametermustbesupportedwithamaximumspacingof32in(80cm)horizontallyand10ft(3m)vertically.RAUPEXpipelargerthan1in.diametermustbesupportedwithamaximumspacingof48in(120cm)horizontallyand10ft(3m)vertically.Alwayscomplywiththeprevailinglocalcodeforsupportspacingintervals.

Fig. 6.14: Single nail hooks Fig. 6.15: Pipe support bend

Fig. 6.16: Talon drive hooks Fig 6.17: Locking clip

6.11.1 Galvanized Steel Support ChannelREHAUgalvanizedsteelsupportchannelisdesignedtosupportRAUPEXpipe,minimizespipeexpansionandreducestheamountofCTSsupports.TheprofileofthegalvanizedsupportchannelisdesignedsotheRAUPEXpipewillsnapinwithoutrequiringadditionalfasteningmethodstoholdthepipeinplace.

Thesupportchannelcanbecuttomeetinstallationrequirementsusingpowertoolssuchasabandsaworhandtools.Whencutting,besurenottobendoraltertheoverallprofileofthechannel.Aftercuttingthechannel,besuretoremoveanysharpedgesorburrstopreventdamagetotheRAUPEXpipe.

Typicalmechanicalclevishangerscanbeusedforsupport,andtheslimprofileofthechannelallowsstandardCTSinsulationtobeinstalledaroundit.InstallingRAUPEXpipeintothesupportchannelbeforesuspendingtheassemblyisrecommended.Iffittingswillneedtobeinstalledin-linewiththerunofpipeinthesupportchannel,besuretohavetheRAUPEXpipeoverhangtheendofthesupportchannelatleasttwoEVERLOC+sleevelengths.Additionally,thegalvanizedsteelsupportchannelshallextendaminimumof1in.(2.5cm)pastthehanger.

Use3/8in.threadedrodtosuspendthesupportchannelwithamaximumspacingbetweensupportsof8ft(2.4m).Alwayscomplywithprevailinglocalcodesforsupportspacingintervals.

Fig. 6.18: RAUPEX pipe supported with steel support channel

6.12 Supporting EVERLOC+ FittingsSupportsandclampsshallnotbeplaceddirectlyontheEVERLOC+fitting,multi-portteeorcompressionsleeve.Alwayscomplywithprevailinglocalcodes.

6.13 Copper SolderingPropersolderingtechniquesmustbefollowedwhensolderingallcompression-sleevefittingsaccordingtotheCopperDevelopmentAssociation(CDA)Handbook:-Thesurfaceofthefittingsolderingareamustbeproperlycleanedforagoodsolderconnection.Applyingfluxisnotconsideredsufficientcleaningforthesolderingarea.Usingapropersandingorbrushtechniqueisnecessarytoremovethesurfaceoxides.Inordertopreventfurtherformationofoxides,thefluxshouldbeappliedimmediatelyafterthecleaningprocess.Aproperfluxthatiscompatiblewiththebrassalloymustbeused.

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-Caremustbetakentonotoverheatthesolderingsurfaceasthiscanleadtotheformationofoxidespreventinggoodadhesionofthesoldermaterial.Itisimperativethatthefittingisheatedevenlyaroundtheentiresurfacesoastonotoverheatoneparticulararea.-Allcompletedsolderjointsmustbetestedforjointintegrityfollowingtheproceduresprescribedbyprevailinglocalcodes.

WhensolderinganEVERLOC+LFbrassfitting:-Thefittingmustbesolderedontothecopperfirst.-Thesolderjointmustbeallowedtocooltoambientroomtempera-turepriortomakinganEVERLOC+connection.

Fig. 6.19: Solder prior to making EVERLOC+ connection

Fig. 6.20: Never solder after EVERLOC+ connection has been made

WARNING Useglovesandaholdingtool.Heatedpipeandfittingscancauseburns.

6.14 Kink RepairRAUPEXpipeisflexibleandresistskinkingevenattemperatureswellbelowfreezing.Ifthepipedoesbecomekinked,flowmaybeobstructedorreduced.Kinkedpipemustberepaired.

Straightenthepipebyheatingtheareawithaheatgun,rotatingtheheatgunaroundthepipetoevenlyheatthesurface.Alwaysusecautionwhenoperatingaheatgunandneveruseatorchoropenflametoheatthepipe.

Whenfullyheated,thepipewillbecometransparent.Whenthekinkisgone,turnofftheheatgunandlettheareacool.(Itisnormalforsmallbubblesorwrinklestoappear.)Thistypeofheatingwillannealorstiffenthepipe,makingitstrongerbutalsolessflexibleintheheatedarea.Therefore,donottrytobendthepipeinthesamespot.Thismayrequireaslightadjustmentoffasteners.

6.15 Thawing Frozen PipeWhenconditionsoccurthatallowwatertofreezeinsidethepipe,theflexibilityofRAUPEXallowsthepipetoexpandaswaterfreezes,aslongasthepipehasroomtoexpand.

Whenthewaterthaws,thepipereturnstoitsoriginalshape.Ifthepipeisnotallowedtoexpand(e.g.,itisencasedinconcrete),itmayburst.Iffreezingdoesoccur,thefollowingmethodscanbeusedtothawthefrozensection: - Heatthefrozenareawithaheatgun.Besurenottoconcentrateexcessiveheatinasingleareafortoolong - Wraptowelsaroundthepipingandpourhotwateronthetowels - Useaspaceheatertowarmtheroomuntilthefrozensectionthaws

WhiletheflexibilityoftheRAUPEXpipeallowsittoexpandaswaterfreezesinthepipe,thisflexibilitydoesnotensuretheintegrityofthejoint.Installersmusttakeprecautionstoensurethatpipesandfittingsdonotfreeze.Thismayresultinleaksandoperationalfailures.

6.16 DisinfectionDisinfectionofthesystemshouldalwaysfollowprevailinglocalcodesandrequirements.Ifrequiredbycodeandnoconditionsarespecified,disinfectusingchlorinationaccordingtoAWWAorICCproceduresoutlinedbelow:

Table 6.2: AWWA/ICC Disinfection Schedule

Chlorine Concentration Disinfection Period Authority

50to100ppm 3hours AWWA

50ppm 6hours ICC

Pre-mixsolutionbeforeinjectingintosystem.Donotallowdisinfectionsolutiontositinsystembeyondthedisinfectionperiod.Thoroughlyflushentiresystemwithpotablewaterafterdisinfection.

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6.17 Pressure TestingRAUPEXpipingsystemsmustbepressuretestedinaccordancewithprevailinglocalcoderequirements.

WARNING Failuretofollowthepropersafetyprecautionsforanairpressuretestcouldresultindangerousseparationofthematerial,leadingtoseriousinjuryordeath.

NOTICE - AlwaysrefertotheprevailinglocalcodesforpressuretestingrequirementsanduseairtestingonlyifapprovedbythelocalAuthorityHavingJurisdiction(AHJ). - REHAUonlyprovidesthegeneralguidelinesforperformingapressuretest,whichbynomeanssupersedeorareintendedtocontradictsafetyrequirements.Itistheresponsibilityoftheinstallingcontractortoensureaproperandsafepressuretestisperformedonsite.

Thefollowingrecommendedpressuretestprocedureappliestobothcompressedairandhydrostatic(water)testing:

6.17.1 General Recommendations-Apressuretestmustalwaysbeperformedpriortoclosinginthesystem(e.g.,behinddrywall).-Performtestusingwaterorairatambienttemperature.Donotexceed150psi(1030kPa)forthepipingsystem.Verifymaximumpressurelimitsarenotexceededforallsystemcomponentspriortoperformingthepressuretest.-WhenairpressuretestingwithEVERLOC+polymerfittingsdonotexceed120psi(825kPa).SeeSection6.17.3SafetyConsiderations.-ApressuretestmustalwaysbeperformedonthesystempriortoandduringtheinstallationofaconcreteslabtoensurethatRAUPEXpipeandconnectionsareleakfree.-Testsshallcomplywithprevailinglocalcodes,and,whererequired,shallbewitnessedbythebuildingofficial.

6.17.2 REHAU Pressure Test Procedure-Useanairtestifconditionsdonotpermitawatertest(e.g.,freezingconditions,insufficientwatersupply/pressure).-Airtemperaturewillaffectthegaugepressure,soperformallpressuretestsataconstanttemperature.Verifymaximumpressurerequirementsforothersystemspriortoperformingthetest.-Performapreliminarypressuretestpressurizingthesystemto1.5timesthemaximumoperatingpressure,nottoexceedthemaximumpressuresdefinedabove,for30minutes.-Asthepipingexpands,restorepressure,firstat10minutesintothetestandagainat20minutes.

-Attheendofthe30-minutepreliminarytest,pressuremustnotfallbymorethan5psifromthemaximum,andthereshallbenoleakage.-Afterperformingthepreliminarytest,performthemainpressuretestimmediately.Themainpressuretestshalllastatleast2hours.Thetestpressureshallberestoredandmustnotfallmorethan3psiafter2hours.Noleakageshouldbedetected.-Itisrecommendedtomaintaintestpressureonthesystemduringfurtherconstruction,wherepractical,toimmediatelyidentifyanydamage.Ifawater(hydrostatic)testisused,protectthewaterfromfreezingordrainwaterfrompipes.

6.17.3 Safety ConsiderationsInmanycircumstances,performingthepressuretestwithairistheonlypracticalmethodfortheinstallingcontractor.Compressedaircanstoreahighamountofenergyascomparedtoperformingthepressuretestwithwater.Therefore,itistheresponsibilityoftheinstallingcontractortofollowallsafetyprecautionsandfollowallgeneralinstallationpractices.

Ifathermosetpolymer(e.g.,PEXpipe)isover-pressurizedandfails(bursts),itdoessoinaductilemode,meaningthatthepipewillswellandthensplitwithnoseparationoffragments.TheminimumburstratingoftheREHAUPEXapipeis480psi(3310kPa)at73.4°F(23°C).

Ifarigidthermoplasticpolymer(e.g.,PPSU)materialisover-pressur-izedandfails(bursts),itdoessoinabrittlemodeandcanresultinseparationofthematerial.

Thereforewhentestingwithcompressedair,thefollowingprecautionsmustbetaken: - Whenotherthermoplasticpipingmaterials(e.g.,CPVC,PP-R)arepresentinthepipingsystem,thesesectionsofpipingmustbeisolatedfromtheREHAUPEXapipingsystemduringthepressuretest.Theinstallermustconsulttheotherpipemanufacturer’sinstallationinstructionsforpressuretestingthosesectionsofthesystem.-Conductavisualinspectionofthepipingsystem,toensureallconnectionshavebeenproperlymadeandallpipinghasbeenproperly secured prior to pressurization.-Allpersonnelperformingthepressuretestmustbeproperlytrainedandweartheappropriatepersonalprotectiveequipment(PPE).-Onlythequalifiedpersonnelshouldbepresentforthepressuretest-Allothertradesmustbenotifiedthatthepressuretestwillbeconductedonthepipingsystem.

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Forupdatestothispublication,visitna.rehau.com/resourcecenterTheinformationcontainedhereinisbelievedtobereliable,butnorepresentations,guaranteesorwarrantiesofanykindaremadeastoitsaccuracy,suitabilityforparticularapplicationsortheresultstobeobtainedtherefrom.Beforeusing,theuserwilldeterminesuitabilityoftheinformationforuser’sintendeduseandshallassumeallriskandliabilityinconnectiontherewith.©2018REHAU 855.73904.2018

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