Browse Forums Building Standards; Getting It Right! 1 Jan 30, 2019 12:36 pm Hello All. My query relates to the installation of a sanitary overflow relief gully on concrete paving. AS 3500.2 details that the ORG has to be set at a level to prevent water ingress. Please don't confuse this with the 75 'm height requirement in other situations. I have 'heard' that the height above concrete paving should be 25 mm & 35 mm. Are there any reference documents available which detail this issue? Thanks. Re: Sanitary Plumbing Query 2Feb 01, 2019 8:34 pm wagga123 Hello All. My query relates to the installation of a sanitary overflow relief gully on concrete paving. AS 3500.2 details that the ORG has to be set at a level to prevent water ingress. Please don't confuse this with the 75 'm height requirement in other situations. I have 'heard' that the height above concrete paving should be 25 mm & 35 mm. Are there any reference documents available which detail this issue? Thanks. Bump Re: Sanitary Plumbing Query 3Feb 01, 2019 10:59 pm wagga123 Hello All. AS 3500.2 details that the ORG has to be set at a level to prevent water ingress. This is correct, you will find this in AS 3500.2 under 4.6. The riser must be set at a height that would be reasonably expected to prevent surface water from entering the sewer system and the height (of the riser, NOT the cap) shown in figure 1 is the 75mm minimum applicable to ground surface water. It must be remembered that the AS is a referenced document that has to meet the performance requirement of the NCC which is the primary document and in some situations 75mm may not be sufficient to meet the performance requirements. For paved surfaces, the height is left to professional judgement and this would take into account the slope and width of the sloped surface and other relevant factors. Because these factors are variable, a specific lesser height cannot be stated. Do you have access to AS 3500.2? You will find different heights being referenced in various Guides and on different plumbing websites but the NCC's Performance Requirements, a State Variation or the referenced AS are what applies, not Guides and 'advice' in documents with no legal standing on different websites. 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: Sanitary Plumbing Query 5Feb 21, 2019 10:33 am The applicable AS/NZS 3500.2 Standard is below. 4.6.6.7 Height above surrounding ground The minimum height between the top of the overflow gully riser, or the invert of the overflow pipe, and the finished surface level shall be 75 mm, except where the gully riser is located in a path or a paved area, where it shall be finished at a level so as to prevent the ponding and ingress of water. The Standard is open to 'professional' judgement and trust in the industry 'professional' (cough) qualified to do the work. NOTE: The invert is the lowest point of a pipe's opening. 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. 2 7328 There is no reason why building contract reconciliation cannot be done prior to handover, if the builder won't do it get someone to do it for you. Why would you pay for… 3 6833 In my experience roof is essential element of the building envelope and hence a common property and should be covered by owners corporation however a detailed review of… 3 6270 |