Gully Trap

Everything you need to know about gully traps Waste Pipes show Level Concrete Surface Grating 25mm preceding(prenominal) paved and 100mm above unpaved What is a gully trap? Agullytrapisabasininthegroundwhichreceivespiped waste weeweefromyourkitchen,bathroomandlaundrybeforeitis emptiedintothesewer. Thebasinhasawatersealtopreventfoul odoursofthesewerreachingthesurface. Thetoporsurroundis raisedabovegroundleveltopreventstormwaterandotherforeign matterenteringthesewer. What should my gully trap look like? Thediagramshowstheacceptedconfigurationofagullytrapasset outintheNewZealandBuildingCode.Gullytraparrangementswhich TheBuildingCodesaysyourgullytrapsurroundsmustbe25mm aboveapavedsurfaceor100mmaboveunpavedsurfaces. Compacted amylaceous bedding material Separation from building material Gully traps are not meant for stormwater Inperiodsofheavyrain,asuddenincreaseinwater flowingintothesewerthroughgullytrapscanresult inwastewateroverflowselsewhereinthesewerage system. Thiscanresultinraw sewageentering ourharbour. Theseexcessiveflowscanalsocause problemsatthewastewatertreatmentplantdueto systemoverloading. Approved gully trap keeping rain water out of the wastewater system.Illegal gully trap all toldowing rain into the wastewater system. Common reasons why rain water flows into a gully trap inClude Incorrectheightofthegullytrapsurrounds Downpipesplumbedintothegullytrapinsteadofthestormwatersystem A TAURANGA CITY COUNCIL SERVICE Landscapingthatdirectswaterintothegullytrap pee seal 65mm (min) donotcomplywiththisconfigurationareconsideredillegal. 600mm (max) Preventing sewer overflows to keep our harbour clean TheSouthernPipelineisa$106Mwastewaterpipeline thatwillredirectmostofthecityswastewateroverto TeMaunga.However,itsstillafewyearsaway. InthemeantimeCouncilhasstartedinspectinggully trapsthroughoutthecityto patroncustomersknowif theirsisOK,andtoofferadviceonhowto stamping groundthemif theyrenot. Ifeverypropertyownerwithanincorrectlydesigned gullytrapfixedit,the amountofstormwatersneaking 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(alsoknown asa nibwall). Thisiscementedintoplacewith sealantaroundtheedgesandwalltokeep stormwateroutofthegullytrap. These areavailablefromaconcretesupplierlike Humes. For more information or advice, please contact Tauranga urban center Council on (07) 577 7000 or go to www. tauranga. govt. nz and type in key language gully trap. A TAURANGA CITY COUNCIL SERVICE If you need more help contact Waterline Ph 577 7000 Web www. tauranga. govt. nz MVM50675F