Hey guys
About the onsite detention construction. Can any licensed plumber do it or does he need to have special certification like how they do with electricians?
Browse Forums Building A New House 1 Jul 07, 2020 10:37 am Hey guys About the onsite detention construction. Can any licensed plumber do it or does he need to have special certification like how they do with electricians? Re: Onsite detention 2Jul 07, 2020 11:25 am The plumber will most often and without question follow the hydraulic assessment plans and then self certify as will the Building Surveyor by accepting the plumber's COC as proof of compliance but be warned that most hydraulic detention plans I see on H1 are substandard and often not compliant. 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: Onsite detention 3Jul 07, 2020 11:41 am SaveH2O The plumber will most often and without question follow the hydraulic assessment plans and then self certify as will the Building Surveyor by accepting the plumber's COC as proof of compliance but be warned that most hydraulic detention plans I see on H1 are substandard and often not compliant. Unfortunately as im not an engineer, i cant tell either way if they are not compliant . In anycase, my rainwater tank is 3000L so should store most of the rainfall before it needs to use the OSD. but you re saying any licensed plumber can install them right? no need for any special certification? Re: Onsite detention 4Jul 07, 2020 12:20 pm It's only plumbing, nothing special. The plumber just needs to be licensed for roof drainage and stormwater. A detention tank has a restricted flow outlet to match the maximum PSD, apart from that the installation is no different to a normal rainwater tank unless you are having a pumped system. I have assumed that you are having an above ground tank that incorporates retention and detention compartments (levels). Apart from the lesser PSD, there will also be a standard 'emergency' overflow outlet at the top. A problem to be aware of is the overflow mesh on both outlets gumming up, these either need to be accessible for maintenance when the tank's water level permits or else flap (frog) valves or a meshed air gap arrangement installed to negate maintenance requirements (my recommendation). The latter is my strong recommendation, see link below. https://rainharvesting.com.au/products/ ... ap-family/ The photo below shows a restricted PSD outlet plus the upper emergency overflow outlet. Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: Onsite detention 5Jul 07, 2020 12:38 pm SaveH2O It's only plumbing, nothing special. The plumber just needs to be licensed for roof drainage and stormwater. A detention tank has a restricted flow outlet to match the maximum PSD, apart from that the installation is no different to a normal rainwater tank unless you are having a pumped system. I have assumed that you are having an above ground tank that incorporates retention and detention compartments (levels). Apart from the lesser PSD, there will also be a standard 'emergency' overflow outlet at the top. A problem to be aware of is the overflow mesh on both outlets gumming up, these either need to be accessible for maintenance when the tank's water level permits or else flap (frog) valves or a meshed air gap arrangement installed to negate maintenance requirements (my recommendation). The latter is my strong recommendation, see link below. https://rainharvesting.com.au/products/ ... ap-family/ The photo below shows a restricted PSD outlet plus the upper emergency overflow outlet. Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ So just need roof drainage and stormwater license. Ill try to ask for a meshed air gap arrangment so i dont have to maintain it. Thanks for the info Re: Onsite detention 6Jul 07, 2020 3:38 pm Having an air gap is actually mandated in QLD (I know that you are in NSW) but it is a superior low cost idea to have on any installation. I would also like to see overflow pipes have a mandated flexible coupling because I have seen just so many crack due to either tank deflection as it empties and fills and/or due to ground movement. 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. |