Browse Forums Eco Living Re: How does this rainwater system work 3Aug 02, 2021 4:08 pm 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: How does this rainwater system work 5Aug 03, 2021 8:46 pm 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: How does this rainwater system work 6Aug 04, 2021 5:21 pm Amazing. You sir you need a medal. Thanks for the effort replying. Re: How does this rainwater system work 7Aug 05, 2021 4:10 pm It won't require much work and cost to upgrade the system to be top notch. If you intend doing so, just ask and I will give you some simple information to follow. . 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: How does this rainwater system work 8Aug 13, 2021 7:42 pm SaveH2O It won't require much work and cost to upgrade the system to be top notch. If you intend doing so, just ask and I will give you some simple information to follow. . Ok I think I'm across it now. Where would the sump typically be located? I've been doing some digging at the base of the tank but the pipe looks to go quite deep. What's the best way to find it? Possible it doesn't have one? Research suggests I should flush the water out after the rainy season but I can't figure that one out. I'd need sump access I assume? I can post a pic of the root Surface area too. It's quite a large area as it covers three terraced levels. Thanks again Re: How does this rainwater system work 9Aug 15, 2021 9:54 am MarqueeMark Where would the sump typically be located? I've been doing some digging at the base of the tank but the pipe looks to go quite deep. What's the best way to find it? Possible it doesn't have one? "Sump" is a term I use to best describe the subsurface wet system pipe. Many wet systems have above ground discharge points but these obviously cannot fully drain the sump plus the head pressure is diminishing during flushing because the hydraulic head (think 'elevation head') is provided by the limited amount of water in the downpipes and the tank's vertical riser. Some properties can flush out their wet system to a lower point and sometimes the subsurface pipes are plumbed to a tank that is down slope from the house which allows the system to be drained. In the case of a rural property off the water grid, this also wastes a lot of water and flushing a thousand litres or more is common. Having a wet system that can't be flushed is not good. HOW DOES WATER FLOW IN A FLOODED PIPE? (read on, this is important to understand) Water flow in flooded pipes is either turbulent or laminar. Turbulent flow is mostly caused by velocity or a disruption due to intersecting water from a tee's branch or a change of direction through an elbow etc. Turbulent flow transfers sediments etc as suspended material which is good for flushing. Laminar flow is settled water that travels fastest through the core while the water on the wall is mostly stationary. This allows most suspended sediments to fall and 'colonise' in 'tails' at the bottom of full flow pipes where it remains mostly stationary until some moving sediment particles attach to the tail of one colony which then sees a similar amount of sediment break away from the front and travel to the next colony where the transfer action is repeated. It is like watching relay runners! Given time, the colonies will form a complete chain of bed load and if there has been bacterial activity breaking down organic matter, the bacterial die off will combine with the sediments to create a gelatinous black tar like substance that many persons have seen when they have cleaned their tanks. The pipes at the head of a wet system have very limited flushing capability due to very low velocities even during the most intense rainfall and installing the same large subsurface pipes to service the furthest downpipes as what service the downstream downpipes is a recipe for sludge build up. HOWEVER, we can capture the bed load by making a very effective DIY sediment trap using off the shelf parts. This is fitted to a non turbulent section of pipe about 4-5 metres away from the last turbulent area and the bed load simply falls down the inverted branch. The branch trap is then reduced in size to increase the flushing velocity and to minimise the amount of water flushed. The pipe reducer denoted in the diagram below is now replaced by an invert taper and the inspection cap is required if the branch size is reduced but no leaf diverters are fitted to the downpipes. A 45 degree junction is best used because the hole is larger than a tee branch. Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ The two links below are property owners discussing the sediment traps fitted to their wet systems. https://forum.homeone.com.au/viewtopic.php?p=1146540#p1146540 post 61 https://forum.homeone.com.au/viewtopic.php?p=1551215#p1551215 post 50 MarqueeMark I can post a pic of the root Surface area too. It's quite a large area as it covers three terraced levels. Knowing the roof area harvested and your 1:20 Average Recurrence Interval (ARI) is important as it will tell you whether the tank's overflow pipe is capable of managing the inflow rate during heavy rain when the tank is full. This is particularly important given your tank design has practically no mitigation capacity and little water depth above the outlet's invert. One of the many failings of the rainwater harvesting regulations is the non requirement for tank manufacturers to state the maximum overflow capacity of every tank's overflow outlet. 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: How does this rainwater system work 10Aug 17, 2021 10:42 am Can you approximate the length of the subsurface pipe between the tank and the nearest downpipe and is it most probably a straight run? 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. There is a whole lot more to know than just the answers you seek but they are a good start. Overflow outlets have a mosquito proof mesh. These… 3 9311 Grate, thank you! RexChan if thats the reason i could sleep well without thinking about additional cost. But 1st i'll need to read about NRV cleaning/replaing stuff. I… 7 32181 |