Browse Forums Building A New House 1 Sep 12, 2008 2:38 pm Hi all,
We have just found out that our council requires us to have a minimum 2000L stormwater detention tank. To be honest I had never heard of the concept before now. Has anyone else had to comply with this requirement and what sort of money is it going to cost to install a detention tank of that size? Thanks for your help. Tina Re: Stormwater detention tank 2Sep 12, 2008 3:07 pm I don't know anything about them but remember that Rikster had to have one installed
https://forum.homeone.com.au/viewtopic.php?t=6236 Think he said it would end up costing him the price of the small car Happy at Home Re: Stormwater detention tank 3Sep 12, 2008 7:18 pm Stormwater detention tank is just a fancy name for a rain water tank.
2000 litres is tiny and if you go for an above ground polyethylene tank it will cost you less than $1000. Demolition August 2009, Construction Started September 2009, Completed December 2010 Re: Stormwater detention tank 4Sep 12, 2008 7:45 pm Casa2 Stormwater detention tank is just a fancy name for a rain water tank. 2000 litres is tiny and if you go for an above ground polyethylene tank it will cost you less than $1000. There you go! Told you I didn't know anything!!! Happy at Home Re: Stormwater detention tank 5Sep 13, 2008 8:51 am Previous topic:
https://forum.homeone.com.au/viewtopic.p ... =detention Re: Stormwater detention tank 7Sep 13, 2008 6:16 pm We upgraded from the 1000L galvinised iron tank supplied in the contract to a 5000L colourbond one, cost of $3150.
I suppose we could of got 2 of them if 10,000L was required. Why do you need them to be underground though? Re: Stormwater detention tank 9Sep 13, 2008 6:33 pm thanks for your reply Judie.
We have a large enough yard for the tank to be behind the house, there is an area out of view which will house the shed, tank, clotheslines, rubbish bins, recycling crates etc, on the opposite side to the alfresco and garden area. I am not aware of anyone here haveing an underground tank, its certainly not something the council require. People with smaller yards seem to just get those narrow galvanised iron ones at the side of their house. Re: Stormwater detention tank 10Sep 15, 2008 10:13 am Hi all,
Thanks for your replies. After reading about Riksters retention tank I got a bit worried. I have done some ringing around and Casa2 is correct that if we are happy to have an aboveground one it won't cost us that much. We will also require a 2500L rainwater tank on top so I am currently in the process of having discussions with the council about whether the rainwater tank can be used to partially or completely offset the detention tank. Thanks for your replies. There is so much involved in building that I had no idea about before we started this process. Re: Stormwater detention tank 11Sep 15, 2008 12:37 pm Craigburn2008 Hi all, Thanks for your replies. After reading about Riksters retention tank I got a bit worried. I have done some ringing around and Casa2 is correct ... Of course Casa is correct, whta else would you expect Demolition August 2009, Construction Started September 2009, Completed December 2010 Re: Stormwater detention tank 12Sep 18, 2008 1:39 pm I think you can feed the stormwater detention tank from the rainwater tank, and you can do it the other way around as long as you still release the full "capacity" of the stormwater tank.
The purpose of the stormwater tank is to hold a little water onsite in a storm, then slowly release over time. In my council, I'm not allowed to permanently retain the water like you do with a rainwater tank. Greg Re: Stormwater detention tank 13Sep 18, 2008 9:16 pm gpierce is dead right. Stormwater detention tanks are meant to detain stormwater during a major storm even then slowly release the water, so as to not cause localised flooding. It is supposed to compensate for the increased hard surface that cannot absorb stormwater. Re: Stormwater detention tank 14Sep 19, 2008 10:02 am In the case of detention you will proberbly need a tank / storage that can pick up all the downpipes and not just one side of the house. Thats where underground tanks work well. The requirement is common where a site is being developed from a single dwelling site to a multi unit site therefore a lot of extra run-off. There are also 'milk crate' style underground storage units available that can be assembled to what ever size (capacity) you need. Re: Stormwater detention tank 15Sep 22, 2008 9:44 am Hi all,
I have actually found out that in the particular part of the estate that I am building I don't need a stormwater detention tank because the developers set it up to go into dams nearby. So I am very happy right now. One less thing to worry about. Thanks for all of your expertise. Tina Plumbers 'can be' plumbers, made all the worse by self certification which the building surveyor invariably accepts as proof of compliance! The good thing is that you know know. 3 5001 Grab a hose, insert it at the top of the inlet/down pipe and turn the water on and see where the water is escaping from. Then you'll know. 3 8695 in the stormwater pit or the drain? Those dont look like theyd fit in the drain. Separately, the pits do get stuff in them during the course of the build. For the most… 1 8030 |