Browse Forums Building A New House BASIX & water tank requirements 6Mar 12, 2012 2:26 pm Spoke to council & finally got hold of someone with some grey matter. It is as suspected for flood control into storm water. It was either the 9,000 litre tanks at $10k or detention pits at $30k. Council stipulated the tanks as the cheaper option to control the flow of water so the guys down the lower part of the street didn't receive all our water at once during heavy rain. Would have been nice if this was explained up front instead of leaving us guessing. Thanks. ... and here we go again 18 90470 From what I know about water tanks (I've been working with a client on them for a few years now) is this - The concrete can last a lifetime if they don't crack for some… 2 10625 If you can calculate the reasonable charged head from let's say 100mm below the gutter to the top of where the vertical riser's horizontal discharge pipe will be, that… 11 17530 |