Browse Forums Landscape & Garden Design 1 Aug 05, 2013 10:37 pm My first major project! Click on the images for larger versions ... The problem: Rain falling on this paddock and everything over the other side of the road that you may be able to see on the far side (due to some poorly designed or implemented road works) all runs into my property and runs into this drain which channels it underground through this pipe which exits here. You can see the white PVC pipe in a small ditch in the middle (site of planned future join - see below): In the same little ditch but not visible is another pipe not actually joined to that PVC pipe that runs underneath the gravel parking area where you can see my blue car, but this pipe is metal and severely corroded, and simply ends just after the parking area, releasing the water onto the ground making everything below this very soggy all winter Last time we had a decent rain the veggie patch and chicken coop (which is under the white netting you can see in the distance) was completely waterlogged. Now I could move the veggie patch but I still need a better way of dealing with the storm water. On the far side of the veggie patch is a creek (actually its the Torrens River - Adelaide's water supply). My current plan is to dig a trench from the end of the 150mm PVC pipe mentioned above and run 150mm PVC pipe to release down at the river, a trench of approx 100m. Hopefully this will result in a much less soggy paddock and veggie patch. That's the simple version. The dream is to actually create a pond where the PVC pipe currently ends, and collect the overflow from this pond and run that down into the river through my new pipe. Does that make sense? Am I crazy? Should I tell the Council or SA Water - or just do it? Anyone have any advice/hints/tips or warnings? Cheers Landed Gentry Re: Stormwater Drainage 2Aug 05, 2013 10:44 pm I've managed to locate some 150mm PVC pipe on Gumtree but it is listed as class 6 pressure pipe, which I feel would be overkill for a storm water run off. It'll still be cheaper than new piping I think, but I did some further research and wondered if anyone might be able to shed some light on some terms I came across. Class 6/9/12 I think is just a pressure rating Can anyone explain what SWJ and RRJ refer to? I think SWJ refers to solvent weld joint - does that just mean you need your standard PVC pipe glue for joining? Re: Stormwater Drainage 3Aug 06, 2013 12:10 am PVCu pressure pipe classes correspond to the pressure rating. Class 6 is 600 kPa. Class 9 is 900 kPa. Class 12 is 1,200 kPa. Class 12 also corresponds to the U.S. schedule 40 pipe. This allows us to use the quality U.S. Spears fittings on the smaller pipes. The pipe's Outside Diameters (OD) are the same but the higher pressure rated pipe has thicker walls. It would be overkill for drainage but if you can get it for a good price, then why not. More power to you! Solvent Weld Joint. Rubber Ring Joint. I have linked a post about solvent welding from another thread below: viewtopic.php?p=941557#p941557 You would normally use DWV (Drain Waste Vent) pipe for your situation. PVCu stormwater and DWV pipes are not pressure rated. Also be aware that the sizes for the three different PVCu pipes are nominal and all differ from each other. It looks like there will be a bit of silting. If you have a reasonable slope, you should be ok. The minimum standard for stormwater drains is a slope of 1:100 and this is to assist with sediment flushing. It also looks like there could be a potential problem with gravel washing into the drain during a storm. Having a detention pond is a good idea as it could come in handy during light rainfall in dry periods provided it didn't leach and turn the surrounds into a quagmire. Does the property have a dam? See also my (late) post in your Introduction thread. viewtopic.php?p=1057607#p1057607 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: Stormwater Drainage 4Jul 14, 2014 5:40 pm So things move slowly in the Hills The problem is getting worse: http://ocau.com/pix/svdvx The water flows from top left to bottom right. As you can see the existing drain is completely stuffed and my carpark is getting smaller and smaller (lucky i have a 4WD!) I've decided to build a little dry stone paved area with a french/japanese drain to help control the water issues underneath my car parking space, and create a stone lined dry creek with a couple of pools and waterfalls downstream of this, rather than bury a big long pipe in a big long trench. Here is a rough picture of the design: http://ocau.com/pix/nfz25 The middle section is a japanese/french drain with small flat rounded stones laid vertically to allow rain falling on the paved area to seep through a gravel bed into the perforated pipe - kind of like this: http://www.pinterest.com/pin/119697302566825331/ I have seen pictures in books and it looks quite durable, but I'm wondering if it is the best idea for a carport.... Will it work? Re: Stormwater Drainage 5Jul 14, 2014 6:44 pm Can you redirect the two pipes and make a swale? 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: Stormwater Drainage 6Jul 14, 2014 8:22 pm Can't really redirect them without MAJOR earthworks. They sit in, and the outflow is into, a natural swale. However, it's unfortunately relatively flat and the water just spreads out over the paddock downstream of this point. Due to the soil and amount of water this just creates a boggy mess. I plan to contain the water within this swale by building a dry creek bed, and collect the water into pools/ponds along it. If I create a more defined channel and line it I hope to keep the surrounding soil a bit drier. I have access to plenty of water so topping up during summer shouldn't be a problem. 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 4872 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 8489 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 7942 |