Gully Trap

Everything you need to know or so gully hollows Waste Pipes Ground Level concrete Surface Grating 25mm above pave and 100mm above unpaved What is a gully trap? Agullytrapisabasininthegroundwhichreceivespiped waste wetfromyourkitchen,bathroomandlaundrybeforeitis emptiedintothesewer. Thebasinhasawatersealtopreventfoul odoursofthesewerreachingthesurface. Thetoporsurroundis raisedabovegroundleveltopreventstormwaterandotherforeign matterenteringthesewer. What should my gully trap look like? Thediagramshowstheacceptedconfigurationofagullytrapasset outintheNewZealandBuildingCode.Gullytraparrangementswhich TheBuildingCodesaysyourgullytrapsurroundsmustbe25mm aboveapavedsurfaceor100mmaboveunpavedsurfaces. Compacted gamy bedding material Separation from structure material Gully traps are not meant for stormwater Inperiodsofheavy precipitate,asuddenincreaseinwater flowingintothesewerthroughgullytraps potentiometerresult inwastewateroverflowselsewhereinthesewerage system. Thiscanresultinrawse wageentering our give. Theseexcessiveflowscanalsocause problemsatthewastewatertreatmentplantdueto systemoverloading. approved gully trap keeping rain water out of the wastewater system.Illegal gully trap allowing rain into the wastewater system. Common reasons why rain water flows into a gully trap implicate Incorrectheightofthegullytrapsurrounds Downpipesplumbedintothegullytrapinsteadofthestormwatersystem A TAURANGA CITY COUNCIL attend to Landscapingthatdirectswaterintothegullytrap piddle seal 65mm (min) donotcomplywiththisconfigurationareconsideredillegal. 600mm (max) Preventing sewer overflows to keep our harbour clean TheSouthernPipelineisa$106Mwastewaterpipeline that resultredirectmostofthecityswastewateroverto TeMaunga.However,itsstillafewyearsaway. InthemeantimeCouncilhasstartedinspectinggully trapsthroughoutthecitytohelpcustomersknowif theirsisOK,andtoofferadviceonhowtofixthemif theyrenot. Ifeverypropertyownerwithanincorrectlydesigned gullytrapfixedit,theamountofstor mwatersneaking intothewastewatersystemwouldbegreatlyreduced. Not all problems will be solved by these options . . . Ifyouhavelandscapingthatdirectsstormwater intoyourgullytrap,youmayneedtospeaktoyour drainlayeraboutoptionstofixthis. Somegully trapsmayalsoneedadditionalworktomakethem compliant.Tofurtherminimiseanywatergettingintothe wastewatersystemallpropertyownersmust ensurethat anypavingsurroundingthegullytrapisgraded todirectallstormwaterawayfromit allwastepipeconnectionstothegullytrap remainwatertight anydownpipesthatcurrentlydischargeinto thegullytrapareredirectedtoastormwater system(e. g. soakholeorreticulationsystem). How can I fix my gully trap? Toraiseyourgullytraptotherequiredheight, suitable. hereareacoupleoflowcostoptionsthatmaybe 1. Installaplasticriser. Thisisfittedoverthe gullytrapwithsealantaroundtheedgesand walltokeepstormwateroutofthegullytrap.Theseareavailablefromhardwareoutlets likeMitre10,PlacemakersorCarters. 2. Installaconcretehalfring(alsoknownasa nibwall) . Thisiscementedintoplacewith sealantaroundtheedgesandwalltokeep stormwateroutofthegullytrap. These areavailablefromaconcretesupplierlike Humes. For to a greater extent information or advice, please clashing Tauranga City Council on (07) 577 7000 or go to www. tauranga. govt. nz and type in key quarrel gully trap. A TAURANGA CITY COUNCIL SERVICE If you need more help adjoin Waterline Ph 577 7000 Web www. tauranga. govt. nz MVM50675F