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 ConnectingHep2Opipetocompressionfittings

applications 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 Pipeworkinstallation

cont. 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 Drylinedwallfeedsforradiators

systems 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/systemmodification

information 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 Boats

applications 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 Advisoryservice

information 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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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

Sitework

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.

28

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 Distance from Support

Distance from Support (m)

Minimum Distance 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

Sitework

Thenailtypeisdesignedforuseonconcealedpipeworkforrapidfixingtotimber.Thescrewtypemaybeusedtogetherwithaspacer(HX86)toallowgreaterspacingbetweenthepipeandthefixingbackground.Thespacerthereforeallowsdifferentpipefixingcentreswhichcanbeusedtofacilitatepipecross-oversorfittingofthermalinsulationtothepipe.

Note:

Acoldformingbendfixture(HX75)isalsoavailabletoallowtheformationofabendon15mmand22mmpipesforsituationswheresecurefixingandneatnessareimportant.

30

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

Sitework

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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Sitework

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.

33

Fig. 36Metallic tape can be used to aid electronic pipe detection

Sitework

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

34

Sitework

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.

35

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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).

36

Fig. 39 Junction box dimensions

Plan

Sidesection

Endsection

Fig. 37 Conduit junction box Fig. 38 Cut conduit box for wall termination

Sitework

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

Sitework

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.

38

Fig. 41 Hot and cold water distribution pipes at tees

Finishedfloorlevel

Junctionboxlid,drilledandsecuredbyfixingscrews

Smallinsulatingpad,cutandplacedtoseparatepipesatcross-over

Thermalinsulationbarrierformedacrossjunctionbox(ifnecessary).

Conduitpipe

Junctionboxsecuredtothesub-floor

Teeoncoldwaterpipe

Teeonhotwaterpipe

Sitework

39

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

Sitework

Terminating the conduitForterminatingtheconduitpipeatwallandfloorfinishlevelfordirect15mmconnectionstoappliances,aconduitterminalfittingisavailable(HX101/15).Forfloorterminationstheplastichousingmaybedrilledthroughthebasetoallowfixing.Floorterminationprocedure (see Fig. 45).

40

Fig. 43 HX101/1515mm conduit terminal

Fig. 45 HX101/15 conduit terminal installation procedure

Fig. 44 HX103 terminal back plate

Sitework

Terminating the conduit continued

ForwallterminationstheHX103terminalbackplatecanbeusedtomounttwoterminalssidebyside(see Figs. 44 and 46)oritcanbeeasilysplittoformtwosingleplates.Thesameterminalbackplatecanalsobeusedtofixamaximumoffourwallplateelbows (see Fig. 47).

41

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

Sitework

Hep2O Pipe-in-Pipe system ThisconsistsofHep2OBarrierpipe(see page 9)pre-sheathedinconduitreadyforunderscreedinstallation.Thissavestimeandeffortwhilstcomplyingwiththecurrentregulations.Hep2OPipe-in-Pipeisavailableinmanageablecoillengths,andtheconduitisavailableinredandbluetoaididentification.

42

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).

43

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.

44

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.

45

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.

46

Heating Systems

ManifoldsHep2O10mmmanifoldsareparticularlysuitedtomicroboreplumbingandareavailablein2and4portversions.Theyaredesignedprimarilyforuseincentralheatingsystemsbutcanalsobeusedforhotandcoldwatersupplies.Hep2O15mmmanifoldsareavailablein2and3portversions.

AHep2Omanifoldisasinglefittingwhichbringstogethermultiplesof10mmor15mmpipe,onthefloworreturnpipework,tooneareaofabuilding,enablingeasyaccess.

AcomprehensiverangeofHep2Omanifoldsisavailable,andthesecanbeconnectedinseriestoallowanynumberofoutlets.Alternatively,arangeof‘spigottee’fittingscanbecoupledtogethertogiveindependent360°jointrotation.

47

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).

48

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).

49

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: literature@wavin.co.uk

Email:info@hep2o.co.uk

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