Browse Forums Building A New House 1 Mar 17, 2016 12:52 pm We have to install an above ground onsite stormwater detention system on our lot. I know OSD's are required in other areas like Baulkham Hills, Kellyville etc... I was wondering if anyone had any pictures of completed above ground OSD systems particularly in the front yard? I know its along shot but worth a try. Re: Onsite Stormwater Detension 2Mar 17, 2016 6:06 pm Above ground OSD is usually just some rainwater tanks that have a diverter where little tube releases half or more of the tank slowly into whatever stormwater path you have. So picture whatever tank you'll use having a pipe on the side with a small black tube attached. Sent from an iPhone please excuse the ridiculous spell correcting software. My forum thread is at viewtopic.php?t=74944 Re: Onsite Stormwater Detension 3Mar 17, 2016 7:43 pm Hi TheBigHouse it actually a large grassed area that has walls on all sides and with 2 large pits at the front and it collects water which slowly drains into the existing stormwater system. It's designed to hold water during a rain event. Re: Onsite Stormwater Detension 4Mar 17, 2016 9:05 pm That's called an OSD basin as opposed to an OSD tank. Two of my clients have them and there is another just around the corner from us. How much is yours supposed to hold ? We are having a tank under our driveway instead. Stewie Re: Onsite Stormwater Detension 5Mar 18, 2016 6:43 am Thanks Stewie, ours has been designed to hold 18,000 litres we also have a 10,000 litre water tank for basix. I am very aware of what is required to build an OSD and what they look like on plans but was hoping to see one completed. We are not allowed any plantings inside our basin and it's in our front yard so was hoping it won't look to out of place. Re: Onsite Stormwater Detension 6Mar 18, 2016 9:46 am I can probably grab a few shots in the next few days of two of them. To be honest they are just flat lawn with sloping sides so they really don't detract from the homes or look out of place at all. How big an area are you talking about? Anything capable of holding more than 300mm of water needs a pool fence around it so you must have a big front yard to hold 18,000L of water at less than 300mm deep ? 22m x 25m x .03 =18,330 L Stewie Re: Onsite Stormwater Detension 7Mar 18, 2016 11:36 am Hi Stewie, That would be great, we are on a 975 sqm block, our OSD is L shaped down the side boundary and continues into the front yard. The levels inside this L shaped basin vary due to the location of the 2 pits max. pool depth is 550mm. We have been advised that as this area will not be holding water for more than a few hours no pool fences will be needed. We don't have individual lot onsite stormwater detentions in our local area so it is difficult to envisage what it may look like - there are a few images online but they are not very helpful. Re: Onsite Stormwater Detension 8Mar 18, 2016 4:06 pm You're lucky. Our council ( Warringah ) won't let us do a basin greater than 300mm otherwise it needs a pool fence. I'm not sure whether they follow the BCA ( now NCC ) for this ruling or it is just their policy. Stewie Re: Onsite Stormwater Detension 9Mar 21, 2016 7:50 pm Hey Stewie, just their policy it appears. I can not find any reference to osd basins and pool fences in documents for NSW. I found a VIC website that stated stormwater basins do not require a pool fence. Re: Onsite Stormwater Detension 10May 12, 2016 2:26 pm Hello All, If you are looking for an alternative OSD system our Landscape Tanks can be utilised as an OSD. Instead of having to bury them underground or under driveways you can install them and make them a feature of your yard. We have saved our customers a great deal of money in the process. Please visit our website at http://www.landscapetanks.com.au/product/on-site-detention-systems/ for more info. Re: Onsite Stormwater Detension 11May 15, 2016 9:29 pm Thank you for your post - we are familiar with this product, Unfortunately these tanks are not suitable for the requirements we need to meet. 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 4857 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 8465 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 7931 |