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Flexible plumbing by Wavin Installer Guide
Flexible plumbing by Wavin
Installer Guide
Contents
Page
Introduction 4 NextgenerationHep2O 5 Unique‘nextgeneration’benefits:
6 Easierinstallationandprovenperformance
7 Approvals
Basics 8 Hep2OPolybutylenePipe 8 Straight
8 Coil
9 Standardpipe
9 Barrierpipe
10 CuttingHep2Opipe
11 Hep2Ofittings
12 JointingwithHep2Opipeandfittings
12 SmartSleeve™pipesupportsleeve
13 Jointingprocedure
14 JointingcopperpipetoHep2Ofittings
15 CheckingthejointusingIn4Sure™joint
recognitiontechnology
16 Demountingjointsusingthe
Hep2OHepKey™system
16 TwotypesofHepKey™areavailable:
16 TouseHepKey Plus™:
17 TouseHepKey™:
18 Hintsandtipsfortrouble-freeHep2Oinstallation
18 Hep2Opipe
19 Hep2Ofittings
19 Handlingandstorage
20 Colour-codedpackaging
Other jointing 21 ConnectingHep2Opipetocompressionfittingsapplications 22 Hep2Oconnectionsadjacenttocapillaryjoints 22 Connectiontochromeplatedorstainlesssteelpipe
22 Connectiontobrassspigots
22 ConnectiontoearlierHep2Osystems
23 ConnectingHep2Ofittingstootherbrandsofpipe
23 ConnectingHep2Otosteelpipesand
threadedbosses
24 ConnectionstoappliancesusingHep2O
24 Systemalterations
24 Usingablankingpegtosealoffafitting
24 Usingastopendtosealoffapipe
25 Whereit’sOKtouseHep2O
25 Whereit’snotOKtouseHep2O
Sitework 26 Cablingthroughjoists 27 Lessrisktohealthandgreatersitesafety
27 Hep2Opush-fitjointingalsohasthe
followingadvantages:
27 Othersystembenefitsinclude:
27 Drillingthefloorjoists
29 Engineeredjoists
29 Spigotteesandmanifolds
29 Connectingpumps,valvesetc:
29 Pipesupport
31 Cableties
31 Pipesupportdistances
32 MinimumbendingradiusforHep2Opipe
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Contents
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Page
Sitework 32 Pipeworkinstallationcont. 32 Concealedlocations 33 Useofmetaltapetoaid‘electronic’
pipedetection
34 Pipesthroughwallsandfloors
34 Layingpipeinfloorscreeds
34 Pipesadjacenttometalwork
34 Hep2Opipemeansquieteroperation
becausethere’slessnoise…
35 Installingpipesinconcretefloorsorwalls
35 Hep2Oconduitsystem
36 Installation
38 Fittingajunctionbox
39 Fittingpipeintoconduit
40 Terminatingtheconduit
42 Hep2OPipe-in-Pipesystem
Heating 43 Drylinedwallfeedsforradiatorssystems 43 Radiatoroutletcoverplate 44 First-fixradiatorfeeds
45 ConnectingHep2Opipetostoragevessels
andradiators
45 ConnectingHep2Otoancillaries
(pumps, valves, etc.)
46 Connectingboilersandheaters
47 Manifolds
48 Installationandperformancebenefits
48 Hep2Owithininternaldrywallsystems
49 Hep2Owithintimberframedandsteel
framedbuildings
50 Generaladvice
Important 51 Freezingformaintenance/systemmodificationinformation 51 PaintingHep2O 51 Useofcorrosioninhibitors
51 Antifreeze
52 Electricalsafety
52 Equipotentialbonding
52 Woodworm/timbertreatment
Precautions 53 Externalinstallations 53 Vermin
53 Chlorine
Testing 54 Pressuretesting 55 Testingprocedure
Special 56 Boatsapplications 56 Caravans 56 Exhibitions
56 Portablebuildings,sitecabins,toiletsetc.
56 Agricultureandhorticulture
Fault finding 57 TypicalProblems 57 1.Jointweeps 57 2.Splitfittings
58 3.Pipeorfittingmelting
General 59 Advisoryserviceinformation 59 Othersourcesofinformation
Introduction
ThisInstallerGuideisdesignedtohelpprofessionalplumbersobtainthebestresultswhenusingHep2Oplasticpush-fitfittingsandpipe.ItprovidesguidanceongoodplumbingpracticeandcomprehensiveadvicetoenableuserstogetthebestpossibleperformancefromtheHep2Osystem.
Hep2OisafullytriedandtestedsystemandhasbeenthefirstchoiceofprofessionalplumbersintheUKforover30years.We’velistenedtoourcustomers,andmadesomemajorimprovementstothefittings.Theresultisour‘NextGeneration’Hep2Osystem.
Next Generation Hep2O NextGenerationHep2Oisourmosttechnologicallyadvancedprofessionalplasticpush-fitplumbingsystemavailable,withafullycomprehensiverangeofwhitefittingsandsomeuniquenewfeaturesdesignedtoreduceinstallationtimeandimproveoperatingperformance.
Hep2Opipeisnowwhitetomatchthenewrangeoffittings,butpipeflexibilityandeaseof‘cabling’isexactlythesameasbefore.
TheHep2Osystemisavailablein10,15,22and28mmsizes,andwe’veintroducedasimplecolour-codeforthepackagingtomakeidentificationeasier:
•10mm: green•15mm: blue•22mm: purple•28mm:orange
4Fig. 1 Next Generation Hep2O
Introduction
Unique Next Generation benefits:We’velistenedtoourcustomers,allprofessionalplumbersandheatingengineers,andwe’verespondedtotheirwishlistwithsomeuniquefeaturesthatarenotavailablewithanyothercomparablepush-fitsystem:
1. In4Sure™ joint recognition tells you when the pipe’s insertedJustinsertthepipeintothefittingthenrotateit.Ifit’sfullyinsertedyou’llfeela‘rumbling’sensation,causedbytheprofiledendofthepipesupportsleevemakingcontactwiththecastellatedseatinsidethefitting.
2. New HepKey™ demounting systemTheclevernewHepKey™makesdemountingquick,easyandtamper-proof,sojointsonlycomeapartwhenyouwantthemto.
3. New SmartSleeve™ for reduced force joint assemblyAswellasformingpartofthenewIn4Sure™technology,thecleverdesignofthenewSmartSleeve™pipesupportsleevealsoreducestheforcerequiredtopushthepipeintothefitting.
4. New white fittings with sleek new lookThewhitecolourcombinedwithaslimmer,morestreamlinedandaltogethermorestylishdesign,meansHep2Ofittingsarenowmuchmoreacceptablefor‘onview’applications.
5. Same quality pipe – but now in whiteWe’vechangedthecolourbutalltheothertraditionalbenefitsofHep2Opipehavebeenretained.Itisjustasflexibleaseverandwithourstraightcoiltechnologystaysstraightwhenuncoiled.
Market-leading 50 year guarantee Duetoarigorousqualitycontrolandtestingprogramme,allNextGenerationHep2Opipeandfittingsareguaranteedfor50yearsagainstdefectsinmaterialsandmanufacturing.
Theonlyprovisoisthatgoodprofessionalinstallationpracticeisfollowed,asoutlinedinthisguide.Notably,thisincludesworkingwithinthepeaklifecycleoperatingtemperaturesandpressuresdetailedinTableNo.1-seepage7.
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4
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1
Fig. 2 Cross section of Hep2O fitting
Introduction
Easier installation and proven performance Hep2Ohasevolvedover30yearsandisnowrecognisedastheprofessional’ssystemofchoice.Withsignificantperformancebenefits,easierandquickerinstallationswithoutanycompromiseonqualityorjointintegrity.PipeflexibilityandjointsecurityremainthekeybenefitsofHep2O.
•Flexiblepipemeansitcanmoreeasilybe‘cabled’aroundobstructions.
•‘Cabling’thepipemeansfewerjointsarerequired.•Fewerjointsreduceinstallationtimeandsystemcosts.•Push-fitalsomeansnonakedflameswithreduced
inherentrisks.
Therearealsosignificantlong-termperformancebenefitsovertraditionalrigidmetalsystems.•Plasticpipemeansnoscalebuild-up.•Nocorrosionandreducedriskofburstpipes.•Quieterinservice,coolertothetouchandlessheatloss.
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Easy demounting with HepKey™ Easy cabling. Fewer joints
No scale build-up
Measure and cut in-situHigh resistance to impact
No bursts. Corrosion free
Fig. 3 Hep2O offers significant benefits over traditional systems
Introduction
ApprovalsHep2OcarriesaBritishStandardKitemarkagainstBS7291parts1&2ClassS.StandardpipeandfittingsalsocarryaBritishStandardKitemarkagainstBS EN ISO 15876.BarrierpipeandfittingsalsocarryaBritishStandardKitemarkagainstBS EN ISO 21003.
AllproductsaremanufacturedunderthescopeofaQualityManagementSystemthatisthirdpartyaccreditedtoBS EN ISO 9001:2008.
Hep2OislistedintheWaterFittingsandMaterialsDirectory–listingnumber0812080.
Hep2OissuitableforuseindomesticwaterdistributionandcentralheatingsystemsincludingpressurisedsystemsandcombinationboilersinaccordancewithTableNo.1.Itmayalsobeusedinbuildingsotherthandwellingsprovidingtheserviceconditionsarenotexceeded.
Hep2Opipeisofferedintwotypes,StandardandBarrier(see page 9).BothareacceptedbyBritishGas/ScottishGasCentralHeatingCareContracts.
Table No. 1 Peaklifecycleoperatingtemperatures/pressures
20°C 30°C 40°C 50°C 60°C 70°C 80°C 95°C Short Malfunction at114°C
Safe pressures:
Bar 12 11.5 11 10.5 9 8 7 6 3
psi 174 167 160 152 131 116 102 87 43.5
Headofwater(m) 120 115 110 105 90 80 70 60 29
Note: All reference to Hep2O fittings on the following pages refer to the latest ‘Next Generation’ range of all white fittings.
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BS 7291
Basics
Hep2O Polybutylene pipeAvailableinstraightlengthsorcoilsinStandardorBarrier.
StraightStraightlengthsofHep2OStandardandBarrierpipearesuppliedin3mlengthsin15mm,22mmand28mmdiameters.Straightpipeisjustasflexibleascoiledpipeandisprimarilyintendedforexposedpipeworkwhereneatnessisvital,orwhereonlyashortlengthofpipeisrequired.
CoilAuniquecharacteristicofHep2Opipecoilisitsremarkableabilitytoremainstraightonceuncoiled,unlikesomeotherplasticmaterialswhichactlikeaspring.Thismakeshandlingsoawkwardthattwomenmaywellberequiredtocarryoutarelativelysimplejob.
Hep2Opipeismucheasiertohandleandmucheasiertocablebecauseofitsinherenttendencytostaywhereit’sput.Eventhoughthecolourhaschangedfromgreytowhite,theeasyhandlingattributesofHep2Opiperemainunchanged.
CoiledHep2Opipeissuppliedin25mto100mcoils,in10mm,15mm,22mmand28mmdiameters,inaSmartPack™dispenser.
•ChoiceofStandardorBarrierpipe.•Uncoiledpiperetainsitsflexibility.•ForinstallationsintoscreedusetheHep2O‘Pipe-in-Pipe’
system.ThisincorporatesHep2OBarrierpipeinapre-sheathedconduit.
8Fig. 4 Hep2O pipe (left) comes off the coil straight
Basics
Standard pipe•Suitablefordomestichot/coldwaterandheating
applications.•Whenusedforheating,asuitableinhibitorsuchasSentinel
orFernoxMB1shouldbeused.
Barrier pipe•Designedforcentralheatingsystems.•Incorporatesanoxygenbarriertoinhibitoxygenpermeation.•Useofinhibitorsarerecommendedascorrosioncanoccur
inalltypesofsystemregardlessofpipematerial.•Mayalsobeusedfordomestichotandcoldwaterservices.
Note: Hep2O pipe is NOT suitable for conveying gas, oil or underground supplies
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•Cutlength: StandardandBarrier straightcutlengths.
•Standardcoiledpipe: Straightcoiledlengthsin
SmartPack™dispenser.
•Barriercoiledpipe: Straightcoiledlengthsin
SmartPack™dispenser.
•Pipe-in-Pipesystem: Hep2OBarrierpipein
blueorredconduit.
Fig. 5 Hep2O offers a range of pipe options
Basics
Cutting Hep2O pipeRecommendedcutters(HD74, HD75, HD77 or HD78),asshowninthecurrentHep2OTradePriceListshouldbeusedtocutHep2Opipe.Placethepipeinthejawsofthecutterandapplypressure,thenrotatethepipeandmaintainthepressureuntilitissevered(see Fig. 6).
Beforemakingajoint,checkthatthepipeendisclean,cutsquareandfreefromburrsandsurfacedamage.
Douserecommendedcutterstocutthepipe.DotestthepipeisfullyinsertedintothefittingwhenmakingajointusingourIn4Sure™technology.Calculatethecorrectpipelength,cutthepipeatoneofthecuttingmarks‘^’printedontothepipe(see Fig. 8).Thedistancebetweenthe‘^’marksistheinsertiondepthintothefittingandthisshouldbeallowedfor.
Note:SmartSleeve™ support sleeve is an integral part of the system and should NEVER be omitted when using Hep2O pipe.
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Don’tuseahacksawtocutHep2Opipe.Don’tusedamagedpipe.Ensurepipeendsarefreefromburrsandsurfacedamage.Ifnot,re-cutthepipe.
Fig. 7 Don’t use a hacksaw to cut Hep2O pipe
Pipesize Nominalinsertiondepthincludingsleeve
10mm 28mm
15mm 32mm
22mm 33mm
28mm 36mm
Fig. 6 Always use recommended cutters to cut Hep2O pipe
Table No. 2CorrectinsertiondepthsforHep2Ofittings
Basics
Hep2O fittings Hep2Ofittingsareonlyavailableinwhite.Theyareofferedincolour-codedpacks(see ‘Packaging’, page 20) inarangeofsizes10,15,22and28mmandinacomprehensiverangeoftypestoansweralldomestichot/coldwaterandheatingapplications.
AllO-ringsealscontainedinHep2Ofittingshavebeenpre-lubricatedduringfactoryassemblyandduringnormalinstallationadditionallubricationshouldnotberequired.
Ifthefittinghasbeenusedpreviouslythenthelubricantmayhavebeenremovedandmayrequirereplacing.InthesesituationsHep2OJointingLubricantSpray(code HX200)mustbeusedtoavoidcontraventionofWaterBy-lawsandensurecompatibilitywithothersystemmaterials(see Fig. 9).
Don’tuseothermanufacturer'slubricantoranyalternative.
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Fig. 8 Hep2O 15mm assembly with pipe markings
Fig. 9 Spraying used O-ring with silicone lubricant
Basics
Jointing with Hep2O pipe and fittings
SmartSleeve™ pipe support sleeveBeforemakingajointusingHep2Opipe,itisessentialtoinsertaHep2OSmartSleeve™pipesupportsleeveintothecutpipeend(see Fig. 10).TheonlyexceptioniswhenconnectingtotheopenspigotendofaHep2Ofitting.
TheSmartSleeve™hasseveralpurposes:•Itensuresthepiperetainsitscircularcross-section.•Iteasesinsertionofthepipeintothefitting.•TheprofiledendoftheSmartSleeve™helpsyoutocheck
thepipeisfullyinserted.SeeIn4Sure™jointrecognitiontechnology(see page 15).
•Itmaintainstherigidityofthepipewithinthefitting.•Itretainsthecircularcross-sectionofthepipeunderextreme
temperatures.•BarbsontheSmartSleeve™lockitinthepipe,whichhelps
ensureitisnotleftinthefittingwhendemounting.
AllSmartSleeve™pipeinsertsaremanufacturedfrom‘foodquality’316stainlesssteelandareimpervioustocontaminants.Theyaredesignedtobecaptiveinthepipebutcanberemovedifrequired,usinglongnosedpliers.However,ifdamaged,theSmartSleeve™mustnotbere-used.
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Fig. 10 Inserting SmartSleeve™ into pipe
Basics
Jointing procedureWhichevertypeofHep2Ofittingisused,thesamejointingprocedureshouldbefollowed.
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1.Cutthepipesquarelyatoneofthe‘^’marksusingrecommendedpipecuttersandensurethepipeendisfreefromburrs (see page 10).
2.InsertaHep2OSmartSleeve™pipesupportsleeveintothepipeend.
3.Pushthepipefirmlyintothefitting,thenuseHep2O’suniqueIn4Sure™jointrecognitiontechnologyto‘feel’ifthepipeisfullyinserted(see page 15).
4.Tugbackonthepipetoensurethegrab-ringengagescorrectlyandpreventsthepipewithdrawing.
Fig. 11 Hep2O jointing sequence
Basics
Jointing copper pipe to Hep2O fittingsHep2OfittingshavebeendesignedtoformreliablejointswithmetriccopperpipewhichconformstoBS EN 1057 - R520.
1. Measurethepipe,allowingsufficientlengthforinsertionintothefitting,andmarkwithapencil(see Table No.2).
2. Cutthecopperpipewithawheelcutter.
3. Carefullyinspectthepipeendsforburrsorswarf.
4.Pushthepipefirmlyintothefitting.
5.Tugbackonthepipetoensurethegrab-ringengagescorrectlyandpreventsthepipewithdrawing.
Withalittleextracare,itisalsopossibletoconnect10mmBS EN 1057 - R220copperpipeintoHep2Ofittings.
R220pipeisparticularly‘soft’andthereforesusceptibletobecomingmisshapedordentedifitisnothandledwithcare.Particularattentionshouldbepaidtothecutend,lookingforanysignsofdamage.R220copperpipeshouldbecutwithaminiwheelcutter,andthenachamfershouldbefiledonthepipeandanycopperfilingsrinsedaway,andthepipedried-off.
Hep2Ocanalsobeconnectedto¾"ImperialcopperpipeusingaspecialO-ringstraightadaptor(HX3A/22)whichaccepts22mmcopperpipeatoneendand¾"Imperialcopperpipeattheother.
Note:New pipe insert for copper providing joint recognition will be available soon.
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Fig. 12 Hep2O fittings are also compatible with copper pipe
Fig. 13 HX3A/22 3/4" Imperial/22mm adaptor
Basics
Checking the joint using In4Sure™ joint recognition technologyFollownormalproceduretoestablishtheinsertiondepthofthepipeintothefittingaspreviouslydescribed(see page 13).
In4Sure™jointrecognitiontechnologythenprovidesafurthercheckbyallowingyouto‘feel’ifthepipeisfullyinserted.
TouseIn4Sure™jointrecognitiontechnology:
1. Holdthecentre(fixed)partofthefittinginonehand.
2. Afterinsertingtheappropriatepipesleeve,pushthepipefirmlyintothefitting.
3. Whilestillpushing,rotatethepipeusingascrewingaction.Ifthepipeisfullyinsertedyouwillfeela‘rumbling’sensationastheprofiledendoftheSmartSleeve™passesoverthecastellatedseatinsidethefitting.
4.Pullbacktocheckthejointintegrity.
Thissimpleprocedureisdesignedtogiveyouthepeaceofmindthatcomesfromknowingthatthejointisgood.Youcanalsomakeavisualcheckbycheckingthenext‘^’markislevelwiththeendofthefitting.
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Fig. 14 Cut-away showing In4Sure™joint recognitiontechnology
Basics
Demounting joints using the Hep2O HepKey™ system
Two types of HepKey™ are available:• HepKeyPlus™simplyclipsontothefittingandholdsthe
grab-ringinitsreleaseposition.•TheHepKey™issmallenoughtobekeptinyourpocket.
Bothtypesarecolour-coded:10green,15blue,22purpleand28mmorange.
WhichevertypeofHep2Ofittingisused,thesamedemountingprocedureshouldbefollowed.
To use HepKey Plus™:1. PlacetheHepKey Plus™aroundthepipe
2. ClipHepKey Plus™overthefitting
3. Inthispositionitdepressestheinnerreleaseringofthefitting.
4. Withdrawthepipefromthefitting.
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Fig. 15 HepKey Plus™ Fig. 16 HepKey™
Fig. 17 Cut-away drawing of HepKey Plus™
Basics
To use HepKey™:1. CliptheHepKey™roundthepipenexttothejointto
bedemounted,withtheflatsideoftheHepKey™awayfromthefitting.
2. SlidetheHepKey™uptothefittingandpresssothattheprotruding'lugs'depresstheinnerreleaseringofthefitting.
3. Withdrawthepipefromthefitting.
Note:Before re-using the fitting we recommend applying a small amount of Jointing Lubricant Spray (code HX200) to the O-ring seal inside the fitting (see page 11).
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Step 1 Step 2
Step 4Step 3
Fig. 18 Demounting sequence using HepKey Plus™
Fig. 19 Cut-away drawing of HepKey™
Basics
Hints and tips for trouble-free Hep2O installationThesearesimpleandeffectiveprecautionarystepswhichshouldbetakentoavoidproblemsandensuretroublefreeinstallationofHep2O.
Hep2O pipeThebiggestpotentialproblemisdamagetoapipeend,intheformofadeepscratchwhichcancreatealeakpathwayforwatertopass.Takingafewprecautionarymeasurescaneradicateanysuchproblems.
•Takecarehowandwherethepipeisstored.•Retainpipeinprotectivepackaginguntilitistobeused.•Neveruseanopenbladedknifetoremovethe
pipepackaging.•Inthecaseofcoiledpipe,alwaysusetheshieldedbladetool
supplied(see Fig. 20)toslitthepackagingaroundtheinsideofthecoil.Thisenablesthepipetobedrawnfromtheinside.Thepackagingthenservestocontainthecoiledpipeuntilthelastmetre(see Fig. 21).
•Whenthreadingpipethroughholesinstone,brickorblockwallsalwaysuseapipesleeveorasmallpieceoffoampipeinsulationtoprotectthepipefromtheroughsurface.
•Ensureexposedfirstfixpipeendsareprotectedfromdamagebyusingatemporaryendprotector.Thisalsoensuresnodebriswillenterthepipe (see Fig. 22).
•Avoidkinkingthepipeduringinstallation.
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Fig. 20 Unwrapping coil
Fig. 22 Always protect pipe ends
Fig. 21 Packaging retains pipe until last metre
Basics
Hep2O fittingsAsthefittingcannotbetakenapartfewproblemscanarisebutsomebasicprecautionsareadvisable.
•Avoiddustanddebrisenteringthefitting.•Storematerialsinasecureplacefreefromdustanddirtetc.•Keepfittingsintheirbagsuntilreadyforuse.•Whenre-usingafitting,sprayalittleHep2OHX200Jointing
LubricantontotheO-ring(see Fig. 9 on page 11).
Handling and storageHep2Oisanextremelytoughanddurablesystem.However,followingthesimpleguidelinesbelowwillensureitsperformanceisnotimpairedbypoorstorage.
•StraightlengthsofHep2Opipeshouldbestoredflatorstackedvertically.
•Coilsmaybelaidontheirsideoredge.•Pipeandfittings,whereverpossible,shouldbestoredintheir
originalpackaging.Thisensuresprotectionfromultravioletlightandreducestheriskofcontamination.
•AllHep2Opipeandfittingsshouldbeprotectedfromcontactwithpetroleumandoilderivatives.
•Avoiddraggingthepipealongthegroundoronothersurfacessuchaswalls.
•Whenfeedingpipethroughholesinwallsandbrickworkpipeendsshouldbetapedover,oranendcapshouldbeused.Theseprecautionswillprotectthepipeendfromdamageandalsopreventdebrisenteringthepipe.
•Careshouldbetakentoavoidkinkingthepipeduringinstallation.
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Basics
Colour-coded packagingTomakebuying,handling,storingandinstallingtheHep2Osystemassimpleaspossible,acolour-codedsystemhasbeenintroduced.
Hep2Ofittingsarenowsuppliedinsealedpolythenebagscolour-codedbysize,whichmakesthemeasytokeepcleanandeasiertoidentify–youcanseeallthe15mmfittingsataglance–justlookforthebluepacks.
Justtomakeiteasierstill,thesamecolour-codedpackaginghasalsobeenappliedtoHep2Opipe.
•10mm:green•15mm:blue•22mm:purple•28mm:orange
Nomoresearchingthevantofindthoseelusive22mmelbows,justlookforthepurplebag!
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Fig. 23 Colour-coded packaging is designed to make product selection easier
Other Jointing Applications
Connecting Hep2O pipe to compression fittingsHep2OpipeissuitableforconnectingtocompressionfittingswhichcomplywithBS EN 1254.
CuttheHep2Opipewiththerecommendedcuttersandproceedasfollows:
1.CutpipeandinsertaHep2OSmartSleeve™pipesupportsleeveintothepipeend.
2. ApplyPTFEtapeifrequired.
3. Fullyinsertthepipeintothefitting.
4. Tightennut,takingcarenottoover-tighten.
Note: • Do not use oil based jointing compounds• Always use an appropriate SmartSleeve™ pipe
support sleeve • Use copper olives in preference to brass• Hep2O pipe will not rotate in a compression
fitting after tightening
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Insert support sleeve into pipe
Ensure pipe is fully inserted
Apply PTFE tape if required
Tighten nut
Fig. 24 Procedure for connecting Hep2O pipe to a compression fitting
Other Jointing Applications
Hep2O connections adjacent to capillary jointsWhenusingHep2Opipeorfittingsadjacenttocapillaryjoints,solderingworkshouldbecarriedoutbeforetheHep2Oisinstalled.Ifthisisnotpossible,keepanyheatawayfromHep2Oandobservethefollowingprecautions:
1. Don’tallowFluxtorunontoHep2Opipeorfittings.Fluxrunsinsidethepipemayoccurduringsoldering,thiseffectcanbereducedbynotusingexcessiveamountsofFluxandbyapplyingFluxtocopperpipeendonly.
2. Don’tallowhotsoldertocomeintocontactwithHep2O.
3. Don’tallowHep2Otooverheat.Wrapadampclotharoundcopperpipetominimiseanylikelyheattransferoruseaheatabsorbinggel.
Note: Systems should be flushed with water to remove any internal Flux residues.
Connection to chrome plated or stainless steel pipeHep2Ofittingscannotbeconnecteddirectlytochromeplatedcopperorstainlesssteel,becauseoftherelativesurfacehardnessofthesematerials.Therecommendedmethodistousecompressionfitting(see page 21).
Connection to brass spigotsTheonlybrassspigotssuitableforjointingintoHep2OfittingsarethoseincludedwithintheHep2Orange.Brassspigotsdesignedforcompressionorcapillaryjointsdonothavethenecessaryjointgroovesandaretooshort.
Connection to earlier Hep2O systemsHep2OisfullycompatiblewithallcurrentandearlierversionsofHep2Ofittings,includingitsimmediatepredecessorandtheearlierAcorn®systemmanufacturedbyBartol.
Pre-1984Acorn®22mmpipewasmanufacturedwithathickerwallandrequiresadifferentpipesupportsleeve.IfcarryingoutremedialworkonsuchasystempleasecontactourTechnicalAdvisoryService–Tel: 0844 856 5165.
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Other Jointing Applications
Connecting Hep2O fittings to other brands of pipeHep2Ofittingsshouldnotbeusedinconjunctionwithothermanufacturers’plasticpipeandfittings,asdimensionaltolerancesandqualitycontrolcannotbeguaranteedbyWavin.
Connecting Hep2O to steel pipes and threaded bossesInordertofacilitateconnectiontomaleandfemaleironthreads,fouradaptors(HX28/HX29 socket adaptors) and (HX31/HX30 spigot adaptors)areavailableintheHep2Orange.Thisenablesconnectiontoawiderangeofdifferentmaterials.
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HX28 Socket adaptor HX29 Socket adaptor
HX30 Spigot adaptor HX31 Spigot adaptor
Fig. 24 Hep2O adaptors
Other Jointing Applications
Connections to appliances using Hep2OWhenconnectingtoappliancesanddishwashersalwaysuseHep2OappliancevalvesfromtheHep2Orange(HX38/15). AdjacentHep2Opipeworkshouldbeclippedinaccordancewiththerecommendedclippingdistancesusingscrew-typeclips(HX85) (see pipe support - page 29).
System alterations
Using a Blanking peg to seal off a fittingWhenyouneedtoprovideatemporaryorpermanentsealtooneoftheportsonaHep2Ofitting,insertablankingplug(HX44)directlyintotheopenconnection.YoucanuseIn4Sure™jointrecognitiontechnologytochecktheplugisfullyinserted.ToremovethepluguseaHepKey™orHepKey Plus™andcontinuewiththeinstallation.
Using a stop end to seal off a pipeWhenyouneedtocloseofftheopenendofapipe,firstfitaSmartSleeve™supportsleeveintotheopenpipeendthenfitastopend(HX62)ontothepipetoprovideatemporaryorpermanentseal.
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HX30 Spigot adaptor
Fig. 25 Valves for connecting appliances
Fig. 26 Blanking peg shown on its own, and inserted into fitting
Fig. 27 15mm stop end
Other Jointing Applications
Where it’s OK to use Hep2OHep2Oissuitableformostdomesticandcommercialhot/coldwaterandheatingapplications.Acomprehensiverangeoffittingsmeetsalltoday’srequirementsandprovidessecureconnectionandreliableoperation.Providinginstallationworkhasbeencarriedoutusinggoodplumbingpracticeasoutlinedinthisguide,allHep2Opipeandfittingsareguaranteedfor50yearsundernormaluse.
Where it’s not OK to use Hep2OTheHep2Osystemhasbeendesignedandtestedtomeettherequirementsofmodernheatingandwaterdistributionsystems.
TestinghasnotbeencarriedouttodeterminesuitabilityforotherpurposesandthereforeHep2Oshouldnotbeusedinthefollowingapplications:•Conveyanceofgas•Conveyanceoffueloil•Inareascontaminatedbypetroleumandoilderivatives•Conveyanceofcompressedair•Hep2Oisnotsuitableforuseinsystemswherethewater
carriedinthepipecontainsahighconcentrationofchlorinee.g.swimmingpoolsordecorativewaterfeatures
•Hep2OwillnotbeaffectedbythoselevelsofchlorineexpectedintheUKwatersupply(typically less than 0.5ppm). Shorttermchlorinationfordisinfectionwillnothaveanadverseeffectonthesystem(see page 51).
•Hep2OshouldnotbeusedfortheprimarycircuitofaSolarHeatingSystemastemperaturecannotbethermostaticallycontrolled.Hep2Oissuitableforsecondarycirculationofthesesystems.
•Hep2Oshouldbeprotectedatalltimesfromexposuretodirectsunlightandultravioletlight.
•Hep2O should not be installed in Continuously operated re-circulating systems (Secondary Hot Water Circulation / Ring main installations). Please see Important Information section on page 51 for more details.
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Fig. 28 New Hep2O is now more compatible with modern sanitary ware
Sitework
Cabling through joistsTheBuildingRegulationsApprovedDocumentAallowsforpipeworktobeinstalledinjoistsbyeithernotchingordrilling.Thetraditionalmethodhasbeentonotchthejoistsastherigidityofthepipedoesnoteasilyallowforanyothermethodofinstallation.Howeverthishasanumberofdisadvantages:•Pipeworkmustbeinstalledpriortothefloorboards
beinglaid.•Plumberhastoworkonopenjoistsincreasingrisk
ofaccident.•Needtoreturnafterfloorsarelaidtoconnectradiators,etc.•Tailsoftenmovedbyothertradesmen,causingextraworkto
repositionpipeworkcorrectlyforradiators.
TheexceptionalflexibilityofHep2Opiperemovesmostoftheserestrictionsbyallowingpipetobeeasilycurvedand‘cabled’throughdrilledjoists,orI-beamswhichmeans:
•Flooringcanbelaidpriortotheplumbercarcassingfrombelowwhichwillprogressthebuildingscheduleasothertradescanworkonthefloorabovee.g.toformstudworketc.
•Sitesafetyenhancedastheplumberisnotexposedtothedangeroffallingorthediscomfortofkneelingonopenjoists.
•Othertradesworkingbelowareprotectedfromthedangersoffallingtools,moltensolder,gasbottlesetc.
•Carcassingatalaterstageintheconstructionprogrammemeansthebuildingislikelytobeweatherproof.
•Lessdangerofpuncturingthepipewithnailsusedforfixingthefloorboardsandnoneedtouseprotectivedevicessuchas‘joistclips’.
Itisworthnotingthatdrilledholesinjoistsshouldbelargeenoughtoallowforthermalmovementofthepipe.
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Fig. 29 Hep2O speeds up installations because pipework can be easily cabled through drilled joists
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Less risk to health and greater site safetyTheuniqueHep2Osystemensures:•Effective,leak-freepipejointingwithoutthe
useofanakedflame.•Nosolderingmeanssafetyfromfire,especially
inrestrictedspaces.•Improvedworkingenvironment.•NoFluxorSoldereliminatespotentialcontamination
ofwatersupplies.
Hep2O push-fit jointing also has the following advantages:•Nonakedflamemeansthatprecautionssuchasobtaining
a‘HotWork’permit,havingafireextinguisherreadilyavailable,andremainingonsiteforawhileafterjointing,arenotnecessary.
•NoriskofinfringementofHealthandSafetyrecommendationsapplicabletosomebrandsofFlux.e.g.meanstocontrolexposuretonoxiousfumeswhenworkinginaconfinedspace,anduseofeyeprotection(where appropriate).
•Afterjointing,thefittingiscleanandsafetotouch,e.g.aftersoldering,thejointishotandFluxtracesneedtoberemoved.
•Jointisrotatableafterinstallation.
Other system benefits include:•Longerpiperunsandlessjoints,duetopipeflexibility.•Eliminationof‘dryruns’aspipecanbecutandjointed
insitu.•Absenceofsolventsmeanstestingcanbecarriedoutas
soonasinstallationiscomplete.•Tailsforconnectiontosanitarywarecanbeleftlongenough
forfinalconnection,thuseliminatingtheneedforstraightandoffsetconnectorsaswithrigidpipesystems.
•Naturalflexibilityofthepipehelpsovercomesmallmisalignments.
Drilling the floor joists•Holediametersshouldbenogreaterthan0.25ofthedepth
ofthejoistandshouldbedrilledattheneutralaxis.•Theyshouldbenotlessthan3diameters(centre to centre)
apartandshouldbelocatedbetween0.25and0.4timesthespanfromthesupport.
Note: The Building Regulations Approved Document A gives exact instructions on the drilling of floor joists.
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Thesepointsareillustrated(see Fig. 30). Thevalue0.25isobviouslyonequarterandcaneasilybecalculatedonsite.Thevalue0.4islessobviousandcanbeobtained(see Fig. 31).
Note:The minimum distance between a hole and a notch in the same joist should not be less than 100mm.
Note: This graph should be used in conjunction with Fig. 30.Example of use: Joist span is 4.5m. Find value on horizontal scale and read up to sloping line.Transfer point of intersection to the vertical scale and read 1.8m.
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Fig. 30 Explanation of drilling joists in accordance with the Building Regulations Approved Document A
HOLES SHOULD BELOCATED IN THISZONE & DRILLED ATTHE NEUTRAL AXIS.
CENTRAL AXISOF JOIST
SPAN ‘S’
NOT LESS THAN 3 DIAMETERSAPART CENTRE TO CENTRE.
MAX. DIAMETERS OF HOLES =0.25 X DEPTH OF JOIST.
DEPTH.
0.4 x ‘S’
0.25 x ‘S’
Fig. 31 Graph showing dimension of joist drilling zone from support
1.5
0.5
1.0
1.5
2.0
2.0 2.5 3.0 3.5Span of joist (m)
Maximum
Distanc
e from Su
pport
Distance from Support (m)
Minimum D
istance from
Support
4.0 4.5 5.0
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Engineered joistsHep2Oisidealinbuildingsincorporatingtimber‘I’joists.Pipingcanbeproperlyinstalledthroughholesinthewebsectionwithoutdamagingflangemembers(eg. TJI Joist system, Truss Joist MacMillan Ltd.)evenwherethepre-formedholesdonotalignontheplan.
Spigot tees and manifolds TheHep2Osystemincorporatesacomprehensiverangeofspigotteeswhichcanbeusedindividuallyoringroupstogivemanifoldarrangementswiththebenefitof360°rotation.Alternatively,thesystemincludesaselectionofmanifoldsfromsingletofourports(see page 47).
Connecting pumps, valves etc:WhereHep2Oisconnectedtopumps,valvesandsimilardevicesconsiderationshouldbegiventoadequatelysupportingtheiteminquestion(bearing in mind the rotatability of the Hep2O joint).Equipmentshouldnotbesuspendedfromthepipewithoutadequatesupport.
Pipe supportTheHep2Osystemincludestwotypesofpipeclip-thescrewfixtype(HX85)andthenailtype(HX65).
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Code NominalDiameter
HX65/10 10
HX65/15 15
HX65/22 22
HX65/28 28
Nail
Screw
Spacer
Code NominalDiameter
HX85/15 15
HX85/22 22
HX85/28 28
Code NominalDiameter
HX86/15 15
HX86/22 22
Note: The HX86/22 spacer can be used with both the HX85/22 and HX85/28 clip.
Fig. 32 Pipe clips
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Thenailtypeisdesignedforuseonconcealedpipeworkforrapidfixingtotimber.Thescrewtypemaybeusedtogetherwithaspacer(HX86)toallowgreaterspacingbetweenthepipeandthefixingbackground.Thespacerthereforeallowsdifferentpipefixingcentreswhichcanbeusedtofacilitatepipecross-oversorfittingofthermalinsulationtothepipe.
Note:
Acoldformingbendfixture(HX75)isalsoavailabletoallowtheformationofabendon15mmand22mmpipesforsituationswheresecurefixingandneatnessareimportant.
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Fig. 33 Pipe fixing centres
Fig. 34 Cold forming bend fixture radii
PipeClip PipeClipandSpacer
Fixingholesizeis5mm.SuitableforaNo.10woodscrew
Fixing hole size is 5mm diameter.
NominalDiameter DimensionA DimensionBmm mm mm
15 17 40
22 21 43
28 24 46
NominalDiametermm RadiusAmm
15 120
22 176
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Cable tiesWhenpipeisconcealed,cabletiesmaybeusedforsupportinsteadofclips.Howevertheseshouldnotbeover-tightened.Thepipeshouldbeallowedtoslidefreelytoallowforthermalmovement.
Pipe support distancesTherecommendedsupportdistancesforgeneralpurposeuseareshowninTableNo.3.
Wherepipingisadequatelysupportedorisrunwithinconcealedspaces(e.g. through suspended timber floors)clipscanbereducedoromittedprovidedthat:•Pipedoesnotformpartofanopenventprovidedforsafe
operationofaheatsource.•Pipedoesnotformadistributionpipeorcircuitwhere
effectiveairventingmightbeimpairedbypoorpipealignment.
•Hotpipewillnotcomeintocontactwithcoldpipeorviceversa.
•Thereisnoriskthatpipesorfittingswillcomeincontactwithsharp,abrasiveorotherpotentiallydamagingsurfaces.
•Thereisnoriskpipewillcomeincontactwithmaterialswhichmaybeaffectedbytransmittedheat.
Wherepipeisvisible,asupportdistancebetweenfixingsof300mmissuggested.
Whereprovisionhasbeenmadeforelectricalwiring,suchasinsomepartitionsystems,thiscanoftenbeutilisedforHep2Opipework.
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Table No. 3Recommendedclippingdistances
NominalDiameter HorizontalRuns VerticalRunsmm m m
10 0.3 0.5
15 0.3 0.5
22 0.5 0.8
28 0.8 1.0
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Minimum bending radius for Hep2O pipe
NominalDiameter mm 10 15 16 20 22 28
A mm 80 120 128 160 176 224
Fig. 35Minimum bending radii (8x pipe diameter)
Fig.34showsacoldformedbendfixture(HX75).Thisissuitableforusewith15mmor22mmwheresecurefixingandneatnessareimportant.
Hep2Opipecaneasilybemanipulatedbyhandtoformbendsofanyangle.Inordertopreventanylongtermdetrimentaleffectonthematerial,thecurvatureofHep2Opipeshouldbenotlessthanthatshown.Abendingradiusof8xthepipediameteristheminimumallowed.Pipework installationHep2Ofittingsarenowmuchsleekerandmorestylishthanpreviously,makingthemalotmoreacceptableforexposedlocations.
However,Hep2Opipeexpandsastemperatureincreases,causingittoundulatealongitslengthandthiseffectissometimesexacerbatedwhereitis‘cabled’throughjoists.Thiswillnotcreateairlocksorhaveanyotheradverseeffectontheoperationoftheplumbedsystem.
Concealed locationsHep2Opipeisrelativelyeasytoinstallinconcealedlocationsinfloors,roofspacesetc.Anyexpansioninthepipewillhavelittlemechanicaleffect,thisbeingabsorbedwithinthepipelengthsoundulationcanbeignored.
InstallationindifficultlocationsisaidedbythecablingabilityofHep2Opipe.Ifadequatelysupported,Hep2Opipeinconcealedlocationsneedonlybeclippedforsystemalignmente.g.atchangesindirection.Ifpreferred,cabletiescanbeusedinsuchareas.
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Use of metal tape to aid ‘electronic’ pipe detectionTheNHBCStandardsincludesasectionwhichaffectstheinstallationofpipeworkinwalls.Itstates:
‘Wherepipeworkisinorbehindwallsurfaces,andwouldotherwisenotbedetectedbyametaldetectororsimilarequipment,ametallictapeshouldbeappliedtothepipework’.
TheNHBChasagreedthatothermethodsofinstallingtapearealsoacceptable,asanytapeappliedtoplasticpipeorfittingswillrequiretestingtoensurecompatibilitywiththepipeandensuretheadhesivewillnotpassthroughthepipeandtaintthewater.
Note:Metallic tape with an adhesive backing should NOT be applied directly to Hep2O pipe and fittings, but the following methods of aiding detection are allowed:
Metallictapewithoutadhesivecanbelightlycrimpedaroundthepipetoallowdetectionbyanelectronicpipedetectoror,adhesivemetallictapecanbestucktothebackingwallascloseaspossibletothepiperun.
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Fig. 36Metallic tape can be used to aid electronic pipe detection
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Pipes through walls and floorsWhereverHep2Opipepassesthroughbrickwork,stoneorconcreteitshouldbesleeved.Theannulargapbetweenthepipeandthesleeveshouldbefilledwitharesilientmaterialtoprovideaneffectivefirestopandalsopreventthetransmissionofnoisefromoneroomtoanother.
Expandingfoam,initsinitialwetstate,mustnotcomeintocontactwiththeHep2Opipeasitcancauseanadversechemicalreactionwhilstdrying.Theuseofapipesleevewillprovidethenecessaryprotection.
Laying pipe in floor screedsUnlikemetalpipes,Hep2Oisnotaffectedbythecorrosiveeffectsofcement,lime,mortarorconcrete.However,accountshouldbetakenoftheWaterByelawswhichrequiresdistributionpipeworktobeaccessibletofacilitateitsremovalandreplacement(see page 35 Hep2O Conduit system).
Pipes adjacent to metalworkWhenrunningHep2Oadjacenttoor‘through’metalwork,itisimportanttoensurethatthepipedoesn’tcomeintocontactwithanysharpedgesasanysubsequentthermalmovementcouldcausedamage.
Thefollowingcautionarymeasuresshouldbeobserved:•Wherepipepassesthroughasmalldrilledhole,fita
suitablegrommet•Wherepipepassesthroughalargeholeinmetalwork
oradjacenttoasharpedge,fixanextrudedflexibleprofiletothemetalwork
•Provideadequatepipeclipsorcabletiestopreventabrasivecontactbetweenpipeandmetalwork
•Runthepipewithinaconduit
Hep2O pipe means quieter operation because there’s less noise…Problemswithnoiseareoftenfoundinsystemswhichincorporaterigidpipes.Hep2Opipedoesnottransmitnoiseandwithcarefulinstallation,canbeinstalledtorunalmostsilently.
…from frictionNoisecanbecausedbyfrictionbetweenapipeandadjacentsurfaces–typicallywhererigidpipesareinstalledbeneathtimberorchipboardflooring.
Hep2Ocangreatlyreducethiseffect.WhereholesaredrilledthroughjoiststheyshouldbeofsufficientdiametertoallowHep2Opipetoslidefreely (see page 26).Thiswillpreventany
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frictionbetweentheundersideofafloor,andmoreimportantly,itwillavoidthe‘ticking’andcreakingnormallyassociatedwiththethermalmovementofrigidpipes
…from knockingNoisecanbecausedbyrigidpipesknockingtogetherorknockingonadjacentsurfaces.Hep2O’sinherentelasticitycushionssuchimpact,causinglessimpactnoiseandabsorbingvibration,thuspreventingthetransmissionofsoundalongthepipe.
…and from ‘water hammer’Similarlynoisefrom‘waterhammer’resultingfromabruptstoppageofwaterflow(typically by closure of quarter turn valves, solenoids and reverberating ball valves).SuchnoiseisnormallyabsorbedbyHep2Oandisnottransmittedalongthepipes.
Installing pipes in concrete floors or walls
Hep2O Conduit systemTheHep2OConduitsystemallowspipeandfittingstobeinstalleddirectlyintoconcretefloorsorintowallswhilstcomplyingwiththerequirementsoftheWaterRegulations.
TheflexibleconduitallowsHep2Opipetobeeasilywithdrawnforinspection,andjunctionboxesallowmaximumaccessibilitytofittingsforinspectionandpossibleremoval.
IfanybentsectionsofconduitpipeareformedinaninstallationthenfuturereplacementoftheHep2Oislikelytorequiretheuseofa‘drawcable’.ThisrequiresacabletobeattachedtooneendoftheHep2Opipebeforeitispulledoutoftheconduitfromtheotherend.Thedrawcableremainsintheconduit.SubsequentreplacementofanewsectionofHep2Opipemayrequiretwooperatives;onepullingthedrawcablewhichisattachedtothepipeend,andtheotherpersonfeeding-inthenewlengthfromtheoppositeend.Futurereplacementwillbeeasierifconduitbendsarekepttoaminimumandanyradiuskeptaslargeaspracticable.Seealso‘Fittingtheconduit’,laterinthissection.
Thesystemisavailableinalldiameters,togetherwithjunctionboxeswithlidsandterminalfittings.
Holescanbecutinthesidesofthejunctionboxattheappropriatepositiontoaccommodatetheconduitwhichsimplyclicksintoposition.
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InstallationTheHep2Opipeshouldbefedintopositionatthesametimeastheconduitsystemisinstalled,i.e.beforescreeding.Theconduitsystemshouldnotbeinstalledonsub-floorsalongtimeinadvanceofscreedingasdamagebysitetrafficcouldoccur.Thejunctionboxallowsaccesstopipefittings,andalsoallowspipecross-overs(which are normally undesirable within the floor screed material).Dimensionsareshown(see Fig. 39).
Theconduitpipeshouldbefixedtothesub-floorusingsuitablestrapstopreventmovement.Conduitpipesforcoldwatersystemsshouldnotberuninfloorscreedswhichincorporateunderfloorheatingloops.Ifrequiredthejunctionboxcanbecutinhalfandinstalledupagainstawall(see Fig. 40).
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Fig. 39 Junction box dimensions
Plan
Sidesection
Endsection
Fig. 37 Conduit junction box Fig. 38 Cut conduit box for wall termination
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37
Installation continued
Thejunctionboxshouldbedrilledusingaholecutterorspadebit,toallowtheconduittofitsnuglyandclickintoposition.Itshouldprotrudeatleast5mminsidethebox.HolesizesandconduitOD’sareshowninTableNo.4.
Table No. 4Drillsizeforconduitboxholes
Hep2OSize ConduitCode Conduit(mm) OD(mm)
10&15 HXC25/15-HXC50/15-HXXC50/10-HXXC50/15 25
22 HXC25/22-HXC50/22-HXXC50/22 34
28 HXXC25/28 42
Note:Central heating pipework should not be run within the same junction box as cold water pipework unless there is space to fix adequate thermal insulation to prevent the warming of the cold water. The prevention of cold water becoming warm is a Water Regulations requirement.
Hep2Opipetoradiatororsanitaryappliance
Junctionboxlid
Junctionboxcutinhalfandsecuredtosubfloor
Fig. 40 Cut junction box
Hep2Oelbow
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Fitting a junction boxThejunctionboxshouldbefixedtothesub-floortopreventmovementduringscreeding.Fixingswithsuitablewashersshouldbeusedandtheboxshouldbepositionedsothatthelid(whenfitted)willbelevelwiththeadjacentfinalfloorfinish.Iftherequiredscreeddepthexceedsthatofthejunctionbox,suitablepackingshouldbeplacedunderthebase.However,ifthejunctionboxistobeinstalledintoinsulation,thereisnoeffectivemethodofholdingtheboxdown,sodoublesidedadhesivetapeshouldbeused.
Note:Thermal pipe insulation is not necessary when the junction box is used solely for central heating pipes.
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Fig. 41 Hot and cold water distribution pipes at tees
Finishedfloorlevel
Junctionboxlid,drilledandsecuredbyfixingscrews
Smallinsulatingpad,cutandplacedtoseparatepipesatcross-over
Thermalinsulationbarrierformedacrossjunctionbox(ifnecessary).
Conduitpipe
Junctionboxsecuredtothesub-floor
Teeoncoldwaterpipe
Teeonhotwaterpipe
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Fitting pipe into conduitTofacilitatethepossibleremovalandreplacementofHep2O,theconduitshouldbeinstalledwithoutjointsandshouldideallyruninstraightlinesbetweenjunctionboxes.Wherebendsareunavoidable,thereshouldnotbemorethantwochangesofdirectionbetweenadjacentjunctionboxes.•Conduitcarryingcoldwaterpipesshouldnottouchconduit
carryinghotwaterorcentralheatingpipes.•Whenrunningconduitwithinfloorscreedstherecommended
gapbetweenhotandcoldshouldnotbelessthan50mminordertopreventthewarmingofcoldwater(see Fig. 42).
•Theconduitsystemshouldnotcontainunusedwaterpipeswhichremainconnectedtowatersystems.Redundantpipeworkwillresultinwaterstagnationwhichwouldposearisktohealth.
Fig. 42 Spacing for cold water conduit in floor screeds
Conduitforcoldwaterpipe Conduitforhotwaterorcentralheatingpipe
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Terminating the conduitForterminatingtheconduitpipeatwallandfloorfinishlevelfordirect15mmconnectionstoappliances,aconduitterminalfittingisavailable(HX101/15).Forfloorterminationstheplastichousingmaybedrilledthroughthebasetoallowfixing.Floorterminationprocedure (see Fig. 45).
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Fig. 43 HX101/1515mm conduit terminal
Fig. 45 HX101/15 conduit terminal installation procedure
Fig. 44 HX103 terminal back plate
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Terminating the conduit continued
ForwallterminationstheHX103terminalbackplatecanbeusedtomounttwoterminalssidebyside(see Figs. 44 and 46)oritcanbeeasilysplittoformtwosingleplates.Thesameterminalbackplatecanalsobeusedtofixamaximumoffourwallplateelbows (see Fig. 47).
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Fig. 47 HX103, terminal back plate and HX6/15 wall plate elbow
Fig. 48 Installation of HX102 terminal fitting plate and HX101/15, 15mm conduit terminal
Fig. 46 HX101/15, 15mm conduit terminal and HX103 terminal back plate
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Hep2O Pipe-in-Pipe system ThisconsistsofHep2OBarrierpipe(see page 9)pre-sheathedinconduitreadyforunderscreedinstallation.Thissavestimeandeffortwhilstcomplyingwiththecurrentregulations.Hep2OPipe-in-Pipeisavailableinmanageablecoillengths,andtheconduitisavailableinredandbluetoaididentification.
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Fig. 49 Hep2O Pipe-in-Pipe is supplied in coils with a choice of red or blue conduit
Heating Systems
Dry lined wall feeds for radiatorsTherearedistinctadvantagestousing10mmHep2Opipeinsteadofmicroborecopperfeedstoradiators.Hep2Opipecaneasilybeaccommodatedbehind‘dotanddab’plasterboard(see Hep2O within internal drywall system on page 48)togiveapipe-freeappearancewithinaroom,butunlikecopper,itisnotsusceptibletodamagesuchasdentsorkinkswhichcanbecausedon‘soft’copperbyotherfollow-ontrades.
Radiator outlet cover plateAneatsolutionwhenusing10mmHep2Opipe,istoutilisetheHX113Hep2ORadiatorOutletCoverPlate.Thiscoverplate,fittedinconjunctionwithabackboxprovidesanexceptionallyneatandeasytoinstallmethodofconnectingradiators.Italsohasthebenefitofahingedflapthatprovidesanairtightseal.
Theboxisfixedinacentralpositionbehindtheradiatorwiththe10mmpipesdroppingouttotheradiatorvalves.Thisgivesasmartprofessionalfinishwherelittleornopipeisseenandfornewbuildprovidesananchorpointforthepipeworkpriortoplastering/boarding(see Fig. 51 on page 44).
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Fig. 50 Radiator pipework in 10mm Hep2O within dry lined walls
Thermostaticradiatorvalve
Pipeclip(HX84/10)
90°Elbow(HD5/10)
90°spigotelbow(HD4/10)
Skirtingboard Radiator
draincock
90°spigotelbow(HD4/10)
Heating Systems
First-fix radiator feedsThefollowingisgoodpracticeforfirst-fixpipework:
•Forconventionalconnectionstoradiators,thepipedropsshouldrunvertically,sidebysideatoneendoftheradiatorposition.
•Wherearadiatoroutletcoverplateisused,theradiatordropsshouldrunvertically,sidebyside,tothecentreoftheradiatorposition.
•Lateralpipesshouldberunhorizontallythroughthestudwork,avoidinganyobviousfixingzonessuchasskirtingboards.
Note: Where subsequent wall fixings are likely, metallic tape should be used to enable an electronic pipe detector to be used (see page 33).
Forfixingpipeworktolightweightblockwork,usewoodendowelsateachclipposition.TheHX65pipeclipisnotsuitableforfixingdirectlytosuchwallsbecauseofthelowpull-outresistanceofthenail.
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Fig. 51 Installation procedure of HX113 cover plate
1. Position back box centrally behind radiator location with adequate pipe for left or right connection
2. Fit cover plate which provides an airtight seal when closed
3. Pipework can now be left until follow-on trades have finished working
4. The result leaves little or no pipe on show
Heating Systems
Connecting Hep2O pipe to storage vessels and radiatorsAlthoughHep2Opipeiscompatiblewithmostothermakesoffittings,whenconnectingittocylinders,radiatorsetc.Hep2Ofittingsshouldbeusedwhereverpossible.IfanappropriatefittingisnotavailablefromtheHep2Orange,arecognisedbrandshouldbeused.
TheHep2Orangeincludesdoublecheckvalves,tankconnectors,gatevalves,stopcocksandcylinderconnectors.
Iftheuseofcompressionfittingsisunavoidablethenthejointinginstructionsoutlinedinthesection,‘ConnectionUsingCompressionFittings’(see page 21)shouldbecarefullyfollowed.
Also:•Do notuseanyjointingcompoundonthejointingshoulder
ofthecylinderconnector,useonlyPTFEtape.•Do notuseanyjointingcompoundwhenfittingtank
connectors,useonlysealingwashers.
Connecting Hep2O to ancillaries (pumps, valves, etc.)WhenconnectingHep2Otoancillaryitems,itisimportanttofollowtheguidanceinthesection‘ConnectionsUsingCompressionFittings’(see page 21).
Hep2OpipeworkmustbeclippedadjacenttotheoutletsofthepumpsandvalvesusingHep2Oscrewpipeclips(code HX85).Thisensuresadequatesupportandreducesvibrationinthemajorityofcases.Whereitisfeltthattheweightoftheconnectedequipmentmeritsextrasupport,metalbracketsshouldbeused.Wherethesizeofthepumpand/orvalverequiresfixingatagreaterdistancefromthewallthancanbeaccommodatedbythepipeclipalone,thiscanbeaugmentedwithapipespacer(HX86).Thiswillallowagreater‘stand-off’distancewhilstmaintainingsecurity.
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Fig. 52 Hep2O tank connector
Heating Systems
Connecting boilers and heatersWhereboilersincorporateahighlimitcutoutthermostat,pumpoverrundeviceandhaveconnectionsoutsidetheboilercasing350mmfromtheheatsource,directconnectioncanbemadeusingHep2O.Typicallytheseboilerscontainacopperheatexchangerandarelowwatercontentboilers.
WheretheabovecriteriafordirectconnectiontoaboilercannotbemetaminimumonemetrerunofcopperpipeshouldbeinstalledbetweentheboilerandthestartoftheHep2Osystem.
Note:Where individual boiler manufacturers instructions state differently, they should always be followed.
Inallcasesincludinginstantaneouswaterheaters,caravanheatersetc.caremustbetakentoensurethatapplianceshavetheappropriatethermostaticcontrolsandcutoutstoensurethatoperatingconditionsdonotexceedthetemperatureandpressurelimitslaiddownforClassSpipe.(see Table No.1 - page 7).
Foranytypeofbackboiler,allthewaterconnectionsshouldbeextendedfromtheappliancetotheoutsideofthefireplaceopeningusingcopperpipe.
Anygravitycircuitofasolidfuelboilershouldalwaysbeinstalledincopper.Regulationsrequirethatmetalpipebeusedasthedischargepipefromtemperature/pressurereliefvalvesonunventedwaterheaters,toorfromatundish,orfromsafetyvalvesonsealedcentralheatingsystems.Onsealedsystemswherethesafetyvalveisnotprovidedwithintheboilercasing,thepipebetweenthesafetyvalveandtheboilershouldbeincopper.AllboilerconnectionsshouldbemadeinaccordancewiththerequirementsofBS 5955,part8.
Note:During commissioning it is important to ensure that all trapped air is purged from the heating system before the boiler is operated. ‘Pockets’ of air can effect proper circulation and impair the correct operation of boiler temperature controls, and this can cause severe overheating.
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Heating Systems
ManifoldsHep2O10mmmanifoldsareparticularlysuitedtomicroboreplumbingandareavailablein2and4portversions.Theyaredesignedprimarilyforuseincentralheatingsystemsbutcanalsobeusedforhotandcoldwatersupplies.Hep2O15mmmanifoldsareavailablein2and3portversions.
AHep2Omanifoldisasinglefittingwhichbringstogethermultiplesof10mmor15mmpipe,onthefloworreturnpipework,tooneareaofabuilding,enablingeasyaccess.
AcomprehensiverangeofHep2Omanifoldsisavailable,andthesecanbeconnectedinseriestoallowanynumberofoutlets.Alternatively,arangeof‘spigottee’fittingscanbecoupledtogethertogiveindependent360°jointrotation.
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Fig. 53 Hep2O manifolds are used to connect multiples of 10mm or 15mm pipe
Heating Systems
Installation and performance benefits•Choiceof2,3or4portmanifoldsreducethenumber
offittingsrequiredtoconnect22mmpipeto10mmor15mmpipe.
•Manifoldsreducethenumberoffittingsrequiredandcutinstallationtime.
•ManufacturedfromPolybutylene,anextremelyrobustyetlightweightmaterial,theyareeasytoinstall.
•LightweightPolybutylenemanifoldsenablepipetobesuspendedbetweenjoistswithoutfearofitbeingdraggeddown.
•Hep2Oblankingpegscanbeusedtocloseoffanyunusedsockets.
Hep2O within internal drywall systemsTheHep2Osystemcaneasilybecabledwithintimberstudworkandwithinwallsystems(eg. Paramount Board) duringconstruction.Thismethodisoftenusedforrunningfeedstoradiatorsorwhereconcealedplumbingisnecessary,e.g.suppliestoarecessedshowermixer.
Aconnectionforaradiatorcanbemadebyusingasecuredelbowinthewallandfixingaplasticsnap-onescutcheontoneatlycovertheholethroughthewallsurface.
Alternativelyfor10mmHep2Oadryliningboxcanbeusedwhichgivestheadvantageofallowingminoralignmentadjustmenttothe‘tail’during‘second-fix’(see Fig 54)andallowingaccesstotheelbow.‘First-fix’pipeworkshouldfollowthegoodpracticeadviceinthetextheaded‘Drylinedwallfeedstoradiators’describedabove,and‘pipesadjacenttometalwork’(see page 34).
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Fig. 54 Radiator connection using 10mm Hep2O and a dry lining box within a drywall
Note: This solution can also be used where the radiator is fed from below in which case the risers should be located directly under each box.
10mmHep2O
Dryliningboxandcoverplate(singlegangelectricalfitting)
Demountableelbow(HD5/10)
Nonload-bearinginternaldrywallsystem
To radiator
Heating Systems
Hep2O within timber framed and steel framed buildingsTheHep2Osystemisidealforusewithinbothtimberframedandsteelframedbuildingsbutconsiderationmustbegivento:
1.Earlydetectionofleakswhichcoulddamagethebuildingfabricifleftunattended.ResultantrepairdelayswouldalsocontraveneWaterBylaws.
2. Installationofthepipeworkwhichshouldbeonthewarmsideofanythermalinsulationlayer.Itmustalsobepossibletoreplaceanypipeswhichpassthroughvapourcontrollayerswithoutaffectingtheintegrityofthelayer.
Tocomplywiththeabove,pipeworkshouldeitherberunwithinarecessedductdesignedbythearchitect,orrunwithinaconduitsystem.Whichevermethodisuseditisnecessarytoconsiderthedetailatthejunctionbetweenthewallandfloortoavoidfloorjoistproblemsandtoagreepipepenetrationsatheaderrails/bottomrails.Forradiatorconnections,10mmHep2Owithinconduitpipemaybeused(see Fig. 55).
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Fig. 55 Radiator connection using 10mm Hep2O within timber or steel framed external wall
Plasterboard
Whencuttingvapourcontrolplasterboardcareshouldbetakennottodisplacevapourcontrolmaterial
10mmHep2O
15mm(nominal)conduitpipe
Theconduitshouldbefirmlyterminatedwithindryliningbox
Demountableelbow(HD5/10)
Dryliningboxandcoverplate(singlegangelectricfitting)
Insulatingmaterial
To radiator
Heating Systems
General advice• Fordrillingholesthroughtimberjoists(see Figs. 30 and 31).•Withinsteelframedbuildings,pipeworkshouldberouted
throughpreformedholesinsteelworkwhereverpracticable.Noholesshouldbeformedinsteelworkwithouttheapprovalofthearchitect.Seetextheaded‘Pipesadjacenttometalwork’(see page 34).
•Do notlaypipeworkinareaswhereplasterboardislikelytobefixed.
•Careshouldbetakentoensurepipeworklocatedwithincompartmentsorpassingthroughpartywallsorfloorsdoesnotimpairthefireratingofthebuilding.
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Fig. 56 Installation is quicker and easier due to the flexibility of the Hep2O system
Important Information
Continuously operated re-circulating systems (Secondary Hot Water Circulation / Ring main installations)Acontinuouslyoperatedre-circulatingsystemisawater-replenishedcirculatingsystemwhichismaintainedataconstanthightemperaturetoprovideaconstantsourceofhotwater.
Continuouslyoperatedre-circulatingsystemsareusedtodistributeconstanthotwatertodrawoffpointsthatmaybedistantfromtheheatsourceorhotwaterstoragevessel.
Continuouslyoperatedre-circulatingsystemsareverydifferentfromconventionalhotwatersupplyandcentralheatingsystemsfoundindomesticproperties,forwhichourproductshavebeentestedto,undereitherBS72912010ClassSorWRASapprovalstandards,andforthisreasonHep2OproductsmustNOTbeusedonanycontinuouslyoperatedre-circulatingsystemsastheyarenotapprovedunderthecurrentversionofthesestandards.
Freezing for maintenance/system modificationHep2Opipecanbefrozenformaintenance/repairswithoutdamagetothesystem.Whenfreezingequipment,manufacturers'instructionsshouldbefollowed.Alwaysfreezeatareasonabledistancefromwherepipeistobecut.
Painting Hep2OHep2Ocanbepainted.Infact,paintingisstronglyadvisedforoutdoorapplicationstoprotectthepipefromtheeffectsofsunlightandultravioletlight.Paintingwithemulsionpaintispreferredbutoilbasedglosspaintcanalsobeusedinconjunctionwithundercoat.Beforepainting,ensureallsurfacesareclean,freeofgreaseanddry.Cellulosebasedpaints,paintstrippersorthinnersmustnotbeused.
Use of corrosion inhibitorsCorrosionofmetalsisahazardinallinstallationsthereforeitisessentialthatpossiblecausesofcorrosionarekepttoaminimum.
Toprovidemaximumsystemprotection,independentofpipematerial,allheatingcircuitsshouldbeprotectedusinganinhibitor.FernoxandSentinelhavebeentestedandaresuitableforusewithHep2Opipeandfittings.
Oxygenwillalmostalwaysbepresentinanysystemasitcanenterthroughavarietyofpoints.Hep2OBarrierpipeincorporatesanadditionaloxygenbarriertoreducetheingressofoxygenthroughthepipewall.Itisacceptedby
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Important Information
BritishGasandissuitableforuseinheatingsystemswhichspecifySuperWarm,GasWarmorarecoveredbyBritishGasContractService.
AntifreezeAntifreezesbasedonEthyleneGlycolmixtureswillnothaveanyadverseeffectonHep2O,howeverifthereisanydoubt,pleasecontactourTechnicalAdvisoryService–Tel: 0844 856 5165.
Electrical safetyHep2Odoesnotconductelectricitythereforethereisnoriskofelectricshock,andthepracticeofutilisingmetalpipeworksystemforearthingwasdiscontinuedin1966.
However,ifHep2Oformsabreakinthecontinuityofexistingmetalpipeworkwhichmayhavebeenusedforearthingorbonding,theelectricalcontinuitymustbereinstatedbyfixingthebondingleadpermanentlytobothendsoftheexistingmetalpipework.ForfurtherinformationcontacttheTechnicalAdvisoryService–Tel: 0844 856 5165,orforinformationonelectricalsafetyandtheIEEregulations,contactaregisteredelectricalcontractororyourlocalelectricityprovider.
Equipotential bondingAHep2Oinstallationrequiresnomoreandinmanycasesneedslessequipotentialbondingthanmetalpipework.
Woodworm / timber treatmentWhentreatingtimberforwoodwormorrot,aqueousbasedsolutionsaregenerallyaccepted,anditispreferabletocarryoutanysuchsprayingpriortoHep2Obeinginstalled.Wherethisisnotpractical,careshouldbetakentoprotectandcoverHep2Opipeandfittingspriortoanyspraying.Pleasenotethatsolventbasedtreatmentsshouldnotbeused.ForfurtherinformationcontacttheTechnicalAdvisoryService–Tel: 0844 856 5165.
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Precautions
External installationsIfHep2Oisinstalledoutdoorsorinanunheatedenvironment,itshouldbeprotectedfromfrostinaccordancewithBS 5422, BS 6700,WaterBylawsandBuildingRegulationsApprovedDocumentL.
Hep2Oshouldbeprotectedfromtheeffectsofultravioletradiation.Ifinsulationhasbeeninstalledtoavoidfreezingthisprovidesadequateprotection.Whereinsulationisnotused,paintingorcoveringisrecommended.
VerminTestinghasdemonstratedthatvermindonotshowapreferenceforHep2Ooverothermaterials.However,allitemswhicharesofterthanrodents’teethareliabletobegnawedinvermininfestedproperty.Ifvermininfestationissuspected,areputablerodentexterminatorshouldbeconsulted.IfverminarepresenttheymaydamageHep2Opipework.
ChlorineHep2OwillnotbeaffectedbythelevelsofchlorineexpectedintheUKwatersupply(typically less than 0.5ppm),norwillshorttermchlorinationfordisinfectionhaveanadverseeffectonthesystem.
However,highsustainedconcentrationsofchlorinewillhaveanadverseeffectonplasticpipe.Hep2Oisthereforenotsuitableforuseinsystemswherethewatercontainsahighconcentrationofchlorinee.g.swimmingpoolsordecorativewaterfeatures.
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Testing
Pressure testingWhentestingHep2Opipeworksystems,therecommendedtestis1.5timesworkingpressure.
IfthesystemcontainsANYearlierversiongrab-ringorSlimLinefitting,afurthertesttoamaximumof18barshouldalwaysbeundertaken,butanynon-Hep2Oappliancesorfittingsthatwillnotwithstandtestingat18barshouldbedisconnected–checkwithothermanufacturersinstructions.
Thedurationofthetestshouldbenotlessthan1hourinaccordancewithBS 6700.
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Fig. 57 Pressure testing
Fig. 58Pressure testing kit (HX81)
Gauge
Valve2Valve1
Testing
Testing procedure
1. Disconnectanynon-Hep2Ocomponentsthatwillnotwithstandthetestpressure.
2. BlankoffallopenendsusingHep2Oblankingpegs‘Systemalterations’(see page 24).
3. ConnectpressurehosetosystemataconvenientpointusingaHep2Osocket.
4.ClosevalveV2andopenvalveV1(see Fig. 58).
5.Completelyfillsystemtobetestedwithwaterandpurgeallair.
6.RaisepressuretotestpressureandclosevalveV1(see Fig. 58).
7.Atendoftestduration,tapgauge(to ensure pointer is ‘free’) andreadpressureongauge.Ifthereisnoappreciabledropinpressure,thesystemiswatertight.
8.ReleasevalveV1andV2toreleasepressureanddrainsystemifnecessary.
Note: Pressure testing is NOT a substitute for making sure the pipe has been correctly inserted into the Hep2O fittings. This should be achieved by following the correct jointing procedure and wherever possible, checking the joints using Hep2O joint recognition technology as detailed (see page 15).
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Special Application
BoatsHep2Oisresistanttocorrosionandlightinweight.Thismakesitideallysuitedtomarineapplications.
TheflexibilityofHep2Opipemeansitcanbecabledaroundtheinteriorcavitiesofboatsandeasilyhiddenbehindbulkheads.ThemechanicalflexibilityoftheHep2Osystemalsoallowsittoabsorbvibrationsfromtheengineandforcesoftheseawhichmaycausesolderedorcompressionjointstocrackorworkthemselvesloose.Hep2Oisimpervioustoelectrolyticcorrosionandperformanceisfurtherassuredthroughjointingtechnologywhichcarriesa50yearguarantee.
CaravansHep2Oisidealforcaravanswhereitslightnessandflexibilityallowsfittinginconfinedspaceswithoutdamagetothefabricofthevehicle,oraddingundulytothekerbsideweight.ResistancetocorrosionandfreezingmakeHep2Oanobviouschoiceforthisapplication.
ExhibitionsEasytoinstallanddismantle,Hep2Oprovidesanidealsolution.Thetemporarynatureofexhibitionscombinedwiththerequirementthatservicesberunforconsiderabledistanceswithmultipletake-offpoints,requiresaplumbingsystemwhichisflexibleandcapableofregulardismantlingandre-installingtodifferentlayouts.AHep2Osystemanswersalltherequirementsforflexibilityandeconomy.
Portable buildings, site cabins, toilets etc.TheHep2OrangeincludesallthenecessaryitemstoensurecompliancewithlocalWaterBylaws(e.g. double check valves)whilstallowingthebuildingtobemovedtoanotherlocationwhenrequired,withtheminimumdisruptiontointernalsystems.Hep2Oistheidealchoiceforthesestructures.
Agriculture and horticultureInherentdurabilityandresistancetocorrosionandcoldweathermakeHep2Oidealformanyapplicationsinagriculturalandhorticulturalenvironments.Typicalapplicationsincludewatersuppliestomilkingparlours,drinkingtroughsandhorticulturalwateringsystems.
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Fault Finding
Intheunlikelyeventofaproblemoccurring,thefollowingnoteswillhelptoidentifythecause:
Typical Problems1. Joint weeps Probable causes:a. Deeplyscoredorscratchedpipe. Evidence:Visualinspectionofpipe.
b. Pipehasbeeninsertedthroughgrab-ringbutnotthroughO-ring.
Evidence:Jointleaksbutpiperemainsinfitting.
c.DustorburrsunderO-ringseal(usually occurs if a hacksaw has been used to cut the pipe).
Evidence:Contaminationevidentonvisualexaminationofcomponents.
d. O-ringsealhasbeendamaged,usuallybytheinsertionofasharpendedcopperpipe),orthepipesupportsleevehasbeenomitted.
Evidence:Causeevidentonvisualexaminationofthecomponent.
e. FittingmayhavebeenconnectedtooldImperialcopper. Evidence:Measurementofpipewillrevealdiscrepancy
withcurrentstandarddiameter(BS 2871 Part: 1 1971).
2. Split fittings Probable cause: Formationoficewithinasystemcontainingmetalpipework,
oradjacenttometaltaps.Evidence:Splittingoffittingorfittingpulledoffpipeafterseverecoldspell.
Note: Water freezes at 0°C and increases 9% in volume. Hep2O pipe can absorb this volume increase without rupture, but if metal pipe or components are involved in the system, the extra pressure generated may occasionally be sufficient to split the fitting.
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Fault Finding
3. Pipe or fitting melting Probable causes:a.MeltingpointofPolybutyleneisapproximately125°C.
Directcontactwithanynakedflame,electricfire,orhotfluepipeetc.wouldcausethepipetomelt.
b.Water/steamwithinpipereachestemperaturesinexcessofnormalboilersafetyandmalfunctionlevels.Thisisveryrareandiffoundshouldinitiateathoroughinvestigationofbothheatingandelectricsystems.Onecausehasbeenfoundtobestrayelectriccurrentpassingthroughimpuritiesinwater.Evidence:Visualexaminationshowsmaterialtobedeformed.Surfaceofmaterialmayappear‘glossy’.IfinanydoubtpleasereturnthepipeandfittingtotheTechnicalAdvisoryDepartmentforfurtheranalysis.
Note:If a fitting is being returned, care should be taken not to damage the sample which may hinder analysis. As much of the affected installation should be returned as possible, but sufficient pipe should be left in fittings to allow pressure testing (minimum requirement 50mm). If possible a full metre of pipe should be returned complete with markings or a note made of all pipe markings.
Theabovenotescoversomepossiblemalfunctionsgenerallyresultingfromincorrectinstallationorserviceconditions.Byfollowingtheproceduresandadvicecontainedinthisguidetheseproblemswillbeavoided.
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General Information
Advisory serviceWavinprovidesacomprehensiverangeofsupportservicestoensurethatanyqueriesaredealtwithswiftlyandefficiently.
Hep2Oisaprofessionalproductandisdistributednationwideviaanetworkofbuilders’andplumbers’merchants.ItisnotavailablethroughDIYorotherretailoutlets.
FordetailsofyournearestHep2Ostockistvisitourwebsiteatwww.hep2o.co.uk
Other sources of informationThePlumbingEngineeringServicesDesignGuidepublishedby:TheInstituteofPlumbing.
BuildingRegulations-ApprovedDocumentsA,GandL.
BS 5449:CodeofPracticeforCentralHeatingforDomesticPremises.
BS 5955:Part8:Specificationfortheinstallationofthemoplasticspipesandassociatedfittingsforuseindomestichotandcoldwaterservicesandheatingsystems.
BS 6700:Design,Installation,TestingandMaintenanceofservicessupplyingwaterfordomesticusewithinbuildingsandtheircurtilages.
TheWaterBylawsListedintheWaterFittingsandMaterialsDirectorylistingnumber0112066.
Thisguidefollowsrequirementsstatedinthestandards,byelawsandregulationslistedpreviously.ShoulditdifferfromanynewUKorEuropeanrequirementsissuedsincewewenttoprint,pleaseobtainclarificationbycallingtheappropriateenquiryhotline.
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HotlinesTechnical Advisory Service:Tel 0844 856 5165
Literature Service: [email protected]
Email:[email protected]
Web Site:www.hep2o.co.uk
Registered Office:Wavin Limited, Hazlehead, Crow Edge, Sheffield S36 4HG
©Wavin 2009. Hep2O is a registered trademark of Wavin. Wavin operates a programme of continuous improvement, and reserves the right to modify or amend the specification of products without notice. All information in this publication is believed correct at the time of going to press. However, no responsibility can be accepted for any errors or omissions.
PL311 – Hep2O 10/10
