Browse Forums Building Standards; Getting It Right! Re: Rainwater tank/Stormwater 2Aug 04, 2019 4:16 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 tank/Stormwater 4Aug 22, 2019 11:28 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 tank/Stormwater 7Aug 22, 2019 9:15 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 tank/Stormwater 11Sep 15, 2019 7:08 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: Rainwater tank/Stormwater 13Sep 16, 2019 9:41 pm darb74 am I right in thinking that if I want to a late night washing load I can simply switch off the pump and tank valve and then our system will happily run on mains instead of tank water? Yes, you can do a trial run to test it. The pipe that feeds in the mains water is also a clever automatic mains water switching device that operates on hydraulic pressure. The link below shows a similar device with details of how it works. Whoever optioned your system has done the best they know how to give you a good system. Most people are given RainBanks! https://www.asctanks.com.au/product/asc ... k-2-mains/ darb74 I would like to know if that diverter system on your website link would be possibly on our tank setup as an easy retrofit? Yes, it's a very easy retrofit and I will mention a few advantages further below. Ordinarily, to divert from a second or third downpipe, downpipe(s) have to be changed to 90mm pvc stormwater pipe, disconnected from the subsurface stormwater system and trenched underground to the tank. The pipe would then divert vertically to the top of the tank and discharge into the tank through a meshed opening. The underground pipe and downpipe(s) will retain water to the level of the water at the top of the vertical riser and flushing a buried pipe to purge built up crud is let's say 'somewhat difficult' when it is a flat block! This diversion method is known as a wet system or charged system. An alternative is to divert pvc downpipes along a wall to the tank which can be aesthetically challenging. The Supadiverta is fitted to a downpipe by removing a small section of pipe and water is diverted to a small but stronger pvc pressure pipe that connects to an inlet valve plumbed about 100mm above the bottom of the tank. The downpipe remains intact and two or more Supadivertas can share a common horizontal pipe at ground level to supply the tank. PVC pressure pipe is AS/NZS 4020 certified as being compliant for use with potable water whereas pvc stormwater pipe is not. This low restriction flow path has an increased variable hydraulic head because of the lower height of water in the tank compared to the height of water in the vertical riser. The emptier the tank...the higher the potential flow rate during heavy rain. The smaller and shorter pipe also retains considerably less water in between rain events. Supadivertas can be fitted to the downpipe at a height that discharges water back to the stormwater system once the tank fills. This gives a huge benefit in that you could effectively divert water from every downpipe to the tank and if you didn't have the current downpipe discharging to the top of the tank, the tank wouldn't need the overflow pipe. Sealing off the overflow port can increase the capacity of most tanks by 8-15%. You also have the option of having a flashing made by a roll former to fit under the Supadiverta, I just haven't got around to putting the dimensions and a photo on the website yet. I think that your tank may possibly only be able to be fitted with a valve in a position near the bottom of the tank as I can see that the plastic where the existing valve is fitted is thicker there, you would need to check this. If so, then you will need to determine the largest valve that can be fitted. A 32mm valve would be good if it can be fitted because 32mm pvc pressure pipe has an internal diameter of (Class 12) 37.5mm and (Class 9) 38.5mm. If a valve can be fitted higher up, it would usually be fitted about 100mm high. Irrigation outlets are invariably cheaper for pressure pipe sales than the big green shed and the larger internal volume (+ 5.8%) Class 9 pipe should be about 25-30% cheaper than class 12 pipe. The tank would have to be emptied to fit the valve. There are many instructional You Tube videos that show how to fit a tank fitting through a new hole near the bottom of the tank. A hole saw with a centre bit is used to drill the hole and the hole size is measured by the fitting's outside thread, not the valve's nominal size. Cutting the wrong size hole is not unheard of unfortunately. 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. 18 90421 DIY, Home Maintenance & Repair But if it is a ground level open pit, then it is not a charged system. No surprises there. The pipes have obviously been altered and there would be a reason for this.… 3 31261 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 31119 |