Browse Forums Eco Living Re: Rainwater Harvesting Wet System Questions 21Jul 09, 2013 12:29 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: Rainwater Harvesting Wet System Questions 23Jul 09, 2013 8:10 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: Rainwater Harvesting Wet System Questions 26Jul 31, 2013 2:24 am 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: Rainwater Harvesting Wet System Questions 28Oct 08, 2020 4:52 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: Rainwater Harvesting Wet System Questions 31Jan 05, 2021 7:19 pm country-Q-town We have an old house, about 170 sqm roof area. Do you know your 1:20 ARI. If not, I can look it up if I know the region. This will tell me the minimum flow rates during a minimum intensity 1:20 ARI. country-Q-town .....and want to put the ICON leaf & debris controller on the fascia board. The ICON unit is easily the most efficient unit currently available provided you have head to spare. Unfortunately it is a tall unit that loses about 140mm more head when the spill level is compared to the the Leaf Eater but there are ways to gain additional head. country-Q-town There is currently 300mm head between the horizontal section of the DP (under the eave) and the tipping point for the water as it enters the tank. Not enough I know. This is why I get annoyed every time I see 'advice' on Government plumbing websites and from unknowledgeable rainwater harvesting experts that say that wet systems need 300mm. country-Q-town I am thinking I'll add an extra DP to each side of the house, so I'll have 3x 90mm DP each side, going into a 100mm line across to the tank. Good idea. The pipe fittings (elbows etc) generate a lot of friction loss and their losses are calculated as equivalent lengths of pipe. I would be shocked if the elbows etc on your system have not more than doubled the wet system's equivalent pipe length. Using an online flow rate calculator and calculating flow rates based on visual lengths is a trap for the unwary. The additional two downpipes (I assume that they will be closer to the tank) will also boost the effective hydraulic head because the water it intersects has already had friction losses but for best efficiency, use a 45 degree rather than a 88 degree junction. country-Q-town I am thinking about putting an inlet into the side of the tank for the 2x 100mm pipes to lower the discharge and increase head. I know this will sacrifice tank capacity as I'll also lower the overflow, but the tank is in a place where it's not really possible to empty it, move it, dig it in etc. You don't need to touch the overflow because if the tank was tall enough, it would fill to the gutter level (if there was no overflow). If you have a mosquito proof leaf diverter, you can divert water directly into a tank because the water has already passed through a fine mesh screen. No screen = bad idea. If you can (it will depend on the tank's construction), have the inlet as low as possible to maximise head.It is also best if you can plumb the inlet pipe to a calming inlet on the tank's floor so that the concentrated flow of falling water doesn't stir up any sediment. If you do, also drill a 5mm air vent hole into the top of the internal pipe. http://www.rainwater-shop.eu/contents/e ... Inlet.html You can also have a small supplementary branch pipe plumbed off the riser and into the tank to retain the vertical riser provided the riser's outlet has a flap valve fitted. You will gain a lot of head by plumbing a lower inlet and this usually allows the additional use of leaf diverters. country-Q-town I'm not sure I understand how the wet system flush would work. Is it a periodic process of opening a valve and emptying the 'wet' system, or does it bleed off over time? A wet system flush valve is archaic because all it does is drain the wet system pipe of some of the captured sediment. This is due to the charged points, i.e. the downpipes and vertical riser(s) being rapidly drawn down, leaving the greater volume of water in the wet system 'sump' to drain by gravity. A much better method learned from our Supadiverta development program is to fit a DIY sediment trap to a non turbulent section of pipe to continually capture the bed load. The best location for you would be about 5 metres past the last pipe fitting (tee or elbow) before the tank. Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Note that if you have leaf diverters fitted, you would use a 100mm DWV 45 degree plain junction and not a more expensive one fitted with an inspection cap. The method is proven and super efficient. Bed load (settled suspended sediment) is mostly stationary and only travels in small groups when it does so. Bed load reconstitutes (becomes larger and heavier) and falls down the 45 degree junction's opening. The 45 degree elbow is size reduced to increase flushing velocity and reduce the flush volume lost. Compared to a standard accumulated flush system, the water retained in the wet system is cleaner and there is considerably less yield loss. Once you have stopped the overflows and you have higher yield, you will also need to examine the overflow meshed outlet capacity but this is easy to substantially improve. 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 9090 Once you know the basics, the rest is easy. Read my post in the thread linked below. viewtopic.php?p=1919271#p1919271 2 20341 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 31837 |