Page 21 - ebook

Backflow prevention requirements for water connections
Backflow prevention requirements for water connections aBcakcflkofwlowprepvrevnetinotniorneqreuqirueimreemnetsnftos rfowrawteartecrocnonnenceticotniosns
Published 17/7/2018 Published 17/7/2018
ublPisuhbeldish1e7d/71/72/071/82018
The Office of the Technical Regulator Plumbing (OTR) manages backflow prevention to meet The Office of the Technical Regulator Plumbing (OTR) manages backflow prevention to meet
the AS/NZS 3500 Plumbing and Drainage Standards. For further information, please visit heTOhefficOeffiocfethoeftTheechTencichanlicRaeglRuelagtuolraPtolurmPlbuimngbi(nOgTR(O)mTRa)nmaagneasgbeascbkaflocwkflopwrevperenvtieontitonmtoeemteet
the AS/NZS 3500 Plumbing and Drainage Standards. For further information, please visit www.sa.gov.au/otrplumbing or call OTR on 1300 760 311. The information in this fact sheet
he tAhSew/NwAZSwS/.Ns3aZ5.S0g03o5vP0.lau0umP/lboutimnrpgbluianmngbdainDngrdaoiDrncragilnleaOSgTtReanoSdnta1nr3d0sa0. r7Fdo6s0r. fF3uo1r1rth.fueThrrtehineifnorfiornmrfmoaratmitoioannt,iopinnlet,hapislefavcsisetitsvhiesiet t provides an overview of our obligations and those of our customers to protect the public water
ww.wspawro.g.vsoaidv.eg.asouav/n.oaoturvp/eolurtvrmpielbwuimnogbf oionurgrcoabrllcliOgaaTllRtiOonTnRs 1ao3n0d01t3h706o0se736o101f .o3T1uh1re.cTuihnseftoirmnmfeoarrstmitoanptionrontheinicstfhathicsetfapshcuetbeslihcteweatter
supply. supply.
rovpidroevsidaens oavneorviewrvieowf ooufr oubrliogbaltiigoantsioansdatnhdostehosfeooufr ocurstcoumsteorms teorsptrotpercotethcet tphuebplicubwlicatwerater uppsulyp.ply.
20mm metered water connections 20mm metered water connections
For new water connections, or when alternate water supplies have been reticulated to or 0m2Fo0rmnewmwematterteceodrnenwedcatwiotenasr,toecrrowcnheonnneancltetirocnanttieoswnaster supplies have been reticulated to or
within the property, the owner of the property, or responsible entity, must engage a qualified within the property, the owner of the property, or responsible entity, must engage a qualified
or nFoerwnewwatweracteorncnoencntieocntsi,oonrs,wohrewnhaelntearnltaetrenawteatwerastuepr psulipeps hlieasvheabveebnerenticreutlaictueldatteodotro or plumbing contractor to assess the proposed use and potential hazard level of the proposed
plumbing contractor to assess the proposed use and potential hazard level of the proposed ithwinitthhine tphreoperortpye, trthye, tohwenoewr noef rthoef tphreoperortpye, ortyr ,reosrproesnpsiobnlesibelnetietyn,tmityu,smt eunstgeanggeaagequaaqlifuieadlified
on−site activities, in compliance with AS/NZS 3500.1 (e.g. low, medium or high hazard).
on−site activities, in compliance with AS/NZS 3500.1 (e.g. low, medium or high hazard). lumplbuimngbicnognctroancttroarcttoratsoseassstehses tphreoporosepdosuesde uasnedapnodtepnotieanl htialzahardzalerdvelel ovef tl hoef tphreoporosepdosed
Based on the assessed hazard rating, a suitably rated backflow prevention device must be
n−osinte−saitcetiavcititeivsi,tiensc, oinmcpolmiapncliaenwceithwAitSh/NAZSS/N3Z5S003.510(0e.1.g(.elo.gw. ,lomwe, dmiuemdiuomr hoigrhihgahzahardz)a. rd). Based on the assessed hazard rating, a suitably rated backflow prevention device must be
installed by the customer immediately downstream of the drinking water connection. The
installed by the customer immediately downstream of the drinking water connection. The device will need to be supplied and installed be a licensed plumbing contractor.
aseBdasoendtohne tahseseasssedssheadzahardzarardtinragt,inags,uaitasubiltyarbalyterdatbeadcbkaflocwkflopwrevperenvtieontdioenvdiceevimceusmt buest be
device will need to be supplied and installed be a licensed plumbing contractor. nstainllsetdallbeydtbhey tchuestcoumsteormimemr imedmiaetdeilaytdeolywdnoswtrenastmreaomf thoef tdhreindkirningkiwngatweracteorncnoencntieocnt.ioThne. The
Our new 20mm drinking water meters contain a low hazard (containment) backflow
evdiceepvriwecveilel nwnetiilolendedteoedvbitceoesbu(depupsaulilpecdphlieaecndkdavinandslvtaein)llseitndastllbaeledleadbeilnicatehnliecsemdnespteldur ampslbsueimnmgbiclnyog. nctroancttroarc. tor. Our new 20mm drinking water meters contain a low hazard (containment) backflow
prevention device (dual check valve) installed in the meter assembly. urOnuerwne20wm2m0mdmrindkirningkiwngatweramteer tmerestceorsnctaointainloawlohawzahardza(crdon(ctaointmaiennmt)ebnat)cbkaflocwkflow
25mm and larger water metered connections
revperenvtieontidoenvdiceevi(cdeua(dl ucahel chkevcaklvvea)lvines)tainllsetdalliendthine tmhetmereatessreamssbelmy.bly.
For drinking water connections 25mm or larger the customer must engage a qualified
25mm and larger water metered connections
plumbing contractor to assess the hazard rating of onsite activities and install a suitably rated 5m2Fo5rmdrmainkninadgnlwadarltgaeerrgcroewnrnaewtceatirotnemsre2m5tmemrteodrrecladorgcnerontnehnecetciocusntiosmnesr must engage a qualified
backflow prevention device. The backflow prevention device needs to be situated at the
plumbing contractor to assess the hazard rating of onsite activities and install a suitably rated or Fdorprinrodkiprninegkrtiynwgbaotwuenradtceaoryncnaoedncjantcieoecntstiot2no5stmh2em5wmaomtrelroamrgeleatergr.tehre thceustcoumsteormmerusmt uesnt geanggeagae qauaqlifuieadlified
backflow prevention device. The backflow prevention device needs to be situated at the lumplbuimngbicnognctroancttroarctoratsoseasssethses thaezahardzarardtinragtionfgoonfsiotensaitcetiavcititeivsitaiensdaindstainllstaaslluaitasubiltyarbalyterdated
For maintenance and testing purposes, isolation valves must be located either side of a
property boundary adjacent to the water meter. acbkaflocwkflopwrevperenvtieontidoenvdiceev.icTeh.eTbheacbkaflocwkflopwrevperenvtieontidoenvdiceevinceendesetdosbtoe bsiteuasiteudateadt tahet the
testable backflow prevention device. A line strainer is also required to be installed upstream of
roperotrhtpyeebdrtoeyuvbincodeua(nreydxacaerdypjatcdoenjanfctiretonstethtrvoeictwheeaintwestramltleaerttimoenre.st)e.Irs.olationvalvesinstalledonservicesof80mm For maintenance and testing purposes, isolation valves must be located either side of a
and larger must be gear activated.
testable backflow prevention device. A line strainer is also required to be installed upstream of
or mFoar imntaeinatenncaenacnedatnedstitnegstipnugrpousrepso,siesos,laistoiolantvioanlvveaslvmeus smt buest lboecalotecdateidtheirthsiedresiodfeaof a
the device (except on fire service installations). Isolation valves installed on services of 80mm estatebslteablaecbkaflocwkflopwrevperenvtieontdioenvdiceev.icAeli.nAelisntreaisntrearinisearlissoarlesoqureirqeudirteodbteo ibnestainllsetdalluepdsturepastmreaomf of
Existing property water connection
and larger must be gear activated.
hetdhevdiceevi(ceexc(expcteopntfoiren fsierervsiceervicnestainllsatatiollantsi)o.nIsso).laIstoiolantvioanlvveaslvinesstainllsetdalloendsoenrvsiceervsicoefs8o0mf 8m0mm
The hazard rating and backflow prevention requirements for a property may change if
ndalnadrgleargmeursmt buestgbeagreaacrtiavcatievda.ted.
another water supply is present or there is a change in the onsite activity. The level of
Existing property water connection
protection will need to be assessed by a licensed plumbing contractor. xiETshxteiinshgtainzpagrrdoprparoetinprgteyarnwtydawbtaeacrktefclorowcnponrenevncenetitoicontiorenquirements for a property may change if
Fire hydrants or sprinkler services
another water supply is present or there is a change in the onsite activity. The level of heTheazahardzarradtinragtinagndanbdacbkaflocwkflopwrevperenvtieontiorenqureirqeumirenmtsenfotsr faorparoperortpyemrtyaymachyacnhgaengife if
proFitrecsetiorvnicwesillmnuesetdhatovebaesainsgselessepdrinbgy−laoalicdendstedstapblulemcbhinegckcvoanltvreacintsotar.lled with certified noathneorthweartweratseurppsulyppislypirsespernetseonrttohrerteheisreaiscahacnhgaenginethinethoensiotensiatectiavictyti.viTtyh.eThleevelelvoeflof
resilient seated gear activated isolating valves installed either side of the check valve to permit rotpercotieocntwioinll nweilel ndeteodbteo abseseasssedssbeydabylicaenlicsednspeldumplbuimngbicnognctroancttroarc. tor.
Firmeainhteyndarnacenatsndoterstsinpgr.iTnhekvlealrvesmeurvstibceeinstalled on the internal pipe work within 3 metres of the property boundary in accordance with plumbing installation standards.
ireFirierhesyedhrvyricadensrmatsunsotshraosvprersaipnsikrniglnelekrslpesreirnrgsv−eilocravedicsedetsestable check valve installed with certified resFilirienhtossearteedlsgmeayr alcsotivreaqteudireisboalactkinflgowvaplrvoetsecintsiotanlldeedpeitnhdernstidueponf the rcishkeractkinvgaalvseatsosepsserdmit
ireFsierervsiceervsicmeussmt huastvheaavesinagsleingsplerinspgr−inloga−dloeaddtedstatebslteabclheechkevcaklvveailnvsetainllsetdallwedithwcitehrtcifeierdtified
by the plumbing contractor or qualified person.
maintenance and testing. The valve must be installed on the internal pipe work within 3 metres
esilriensitliesenat tsedatgeedagreaacrtiavcatievdatiesodlaistoinlagtivnaglvveaslvinesstainllsetdalleidtheirthsiedresiodfethoef tchheechkevcaklvveatlvoepteormpeitrmit
of the property boundary in accordance with plumbing installation standards. aimntaeinatenncaenacnedatnedstitnegst.inThge. Tvhaelvveamlveusmt buestibnsetainllsetdalloendtohnetihneteirntaelrnpaiplepiwpeorwk worikthwinit3himn 3etmreestres
Extension to existing fire service installations
f thoef tphreoperortpyebrtoyubnoduanrydainryaicncaocrdcaonrdcaenwceithwpitlhumplbuimngbingstainllsatatiollantsiotannsdtanrdsa.rds.
Fire hose reels may also require backflow protection dependent upon the risk rating as assessed
Where alterations and extensions are made to existing fire services and a single check valve bytethsteabplleumwibthinWgactoenrMtrarckteodr orersqilieunatlifsieadtepdergsoena.r activated isolation valves is not installed. The
ireFhiroesehoreselrsemelasymalsyoarlesoqureirqeubiraecbkaflocwkflopwrotpercotieocntdioenpdeenpdendteunptounptohnetrhisek raisktinragtiansgaasseasssedssed
plumbing contractor or appropriately qualified person shall upgrade the fire service
y tbhye tphleumplbuimngbicnognctroancttroarcotor rqouraqlifuieadlifipeedrspoenr.son.
connection (either fire booster assembly or unassisted stand-alone fire hydrant) with the level of backflow prevention as per AS/NZS 3500.1 and as regulated by the Office of the Technical Regulator.
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