Browse Forums Eco Living Re: Water tanks for the technically challenged 42Mar 05, 2014 9:22 am Owner Building at Jimboomba Woods in Logan City Qld. Blog : http://bandlnewhomebuild.blogspot.com H1 thread : viewtopic.php?f=38&t=68283 . Re: Water tanks for the technically challenged 45Mar 05, 2014 12:36 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: Water tanks for the technically challenged 47Mar 05, 2014 1:26 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: Water tanks for the technically challenged 49Mar 05, 2014 1:50 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: Water tanks for the technically challenged 51Mar 06, 2014 8:56 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: Water tanks for the technically challenged 54Sep 30, 2020 1:08 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: Water tanks for the technically challenged 56Sep 30, 2020 2:00 pm Suction depends on the demand and your end fixtures have a demand of about 6 lpm. Friction loss at low velicity is minor. I have posted a chart below that shows friction loss per metre through common low density garden irrigation (black) poly pipe which has an ID very close to its nominal size. You will see that there will be no drama having a long run to low fill demand end fixtures. Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ 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: Water tanks for the technically challenged 58Sep 30, 2020 2:15 pm 32mm Blue Stripe has an ID of 27mm but the chart gives a good indication of the lesser friction losses with larger pipes. The chart shows common garden irrigation pipe, not Blue Stripe. Do you remember the issue you had with the low flow out of the garden hose yet there was good pressure at the tap? It was all about friction losses through the 12mm hose. 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: Water tanks for the technically challenged 59Oct 06, 2022 1:30 pm I am trying to finalise the details of our new rainwater harvesting system before we start landscaping. We intend to use three Supadivertas (see https://www.supadiverta.com.au) to connect the three downpipes on the south side of our house to the rainwater tanks. The advantage of using the Supadivertas is that we won't have to bother with any underground pipework. I have concocted a very amateurish drawing of how I see the system working, though I am unsure whether this is actually feasible. Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Our present round 2500L poly tank (which currently sits under our bedroom window) will be moved to a position next to (but not on) the easement, so that we can support it on a concrete base. We shall then place a rectangular Thintank to the right of it. The dimensions of the present poly tank are as follows: 1250mm diameter 2195 height 2175mm present inlet height The dimensions of the rectangular Thintank are: 1500mm length 75mm width 1950mm height We have eaves and the approximate distance from the gutter to the ground at drainpipe A (the closest drainpipe to the tank) is 2.80m. The approximate distance from the gutter to the ground at drainpipe C (the furthest drainpipe from the tank) is 3.26m. I have a couple of concerns at this stage - 1. Is drainpipe C, which is 17.34 metres from the rainwater tank, too far away? Will we get enough pressure in the pipes to fill the tank? 2. The pipes from drainpipe A and B will need to cross the footpath at some point and this will no doubt create a tripping hazard. This means we will have to ask for a groove in the paving before it is laid down to accommodate the pipe, so we had better know exactly where we want it, or is there some way of covering the pipe??? The current poly rainwater tank has been disconnected from the stormwater system and is now standing empty, so it won't be difficult to move it. It is partly buried in the ground though and I can post a picture of it but its height won't be a true indication of its height when moved. Re: Water tanks for the technically challenged 60Oct 10, 2022 8:42 am Using Supadivertas has many advantages, one of those being not having the stormwater pipes annexed and used as a wet system with a vertical riser as per your original water tank plumbing. It is certainly an advantage that your stormwater system has been restored. First Thoughts: TANKS: Having two tanks allows you to have a settling system whereby water transfers to the round tank and decanted water is transferred to the thin tank several days later. The transfer (balance) valves need only be 25mm and flexible hose used as the transfer pipe. The pump would draw water from a 25mm valve fitted about 100mm above the bottom of the ThinTank. Because the Supadiverta diverts water to a valve (low restriction inlet) fitted about 100mm above the bottom of the tank, you have the choice to not need overflow pipes fitted to the tanks. This (usually) also increases a tank’s storage capacity. ThinTank. Height 1.950 metres. You will gain additional storage capacity by capping or simply not optioning an overflow outlet but water must not cover the tank’s top inlet basket’s mesh. Having a bird bath is not a good design feature! The tank will need to be optioned with two 25mm ball valves fitted 100mm above the bottom of the tank at the valve’s lowest point. Note that most tank outlets take the height from the middle of the hole but it isn’t a problem if they do this because the tanks will have minimal sediment when compared to standard rainwater harvesting systems. Original round tank. Height 2.195 metres. This tank has an overflow provision previously used at the top of the tank next to the inlet basket. This is bad design as its height does not provide any mitigation during heavy rain but the overflow opening can now be capped because the Supadiverta can also serve as the overflow. Because this tank will be linked to the ThinTank, its full water level must be no higher than the ThinTank’s full level if the balance valves are left open during rain periods. There is about 150mm height above the top of the side wall to the top of the protruding inlet. This means that this tank can only fill to about 100mm below the top of its side wall to match the thin tank’s maximum capacity height but this will be compensated somewhat by the thin tank gaining about 100mm more storage depth. The tank will require one 25mm (balance) valve and a 50mm valve, both fitted about 100mm above the bottom of the tank’s floor at the valve’s lowest level. Fitting ball valves is recommended. Fitting Supadivertas. Downpipe adaptors are required to couple the 90mm downpipes to the Supadivertas. How much gap is there between the downpipe where the tank use to be and the small wall? The Supadiverta is 315mm long at its widest point but the length includes the downpipe. When a Supadiverta is also used to substitutes as the tank’s overflow, the tank’s water level is governed by the height of the Supadiverta’s internal reservoir wall after the Supadiverta has been fitted to a downpipe. Once the tank fills to the same level, excess water will overflow over the reservoir wall to the stormwater system. There is a website address on the outer walls that is the same height as the top of the reservoir wall, this can be used with a laser level or a straight edge as line of sight. The pipework doesn’t have to be connected at the same time the Supadiverta is fitted because wrapping some cling wrap around the internal filter will divert all water to the still intact stormwater system. Concrete path. It would be best if a common pipe serving DPs A & B is plumbed under the path. Because Supadiverta has a syphonic drainage system, it uses smaller pipes and this makes the excavation a lot easier. I anticipate the pipe being 40mm. IMPORTANT: A pipe can dip down (under the path) then up again but it cannot be plumbed upwards and down again (as per an inverted U) as doing this will result in an air pocket. If you Google “laying a pipe under a path” on YouTube, several videos will come up showing how to do a hydraulic excavation using a garden hose. The video below uses a pvc pressure pipe (American Schedule 40 pipe) to excavate the passage and another smaller pipe later plumbed but you will be using just the one pipe. If the end gets damaged at all, the last few cm is easily removed. https://www.youtube.com/watch?v=KKTvln1lKBA Plumbers know the above method and you will need a plumber to fit the Supadivertas to the downpipes which is quick and easy. https://www.supadiverta.com.au/fitting.html The plumber only needs to measure from the nearest Supadiverta because the other two Supadiverta's line of sight can be measured from the weatherboards. Pipe sizes. IMPORTANT: The pipes must not be oversized as having a regular adequate sediment flushing velocity is very important when having a wet system. The big failing with standard wet systems is their annexing of the stormwater system pipes which must be compliant for a 1:100 year storm event as they also accept surface drainage and water from silt pits that ag pipes drain to. They are also required to have a slope and to drain with channel flow whereas a rainwater harvesting wet system has pipes that flow full of water. A stormwater pipe’s full flow velocity at the head of a wet system is substantially less than the minimum flushing requirement even during high intensity rainfalls, the reason why sludge builds up. Unnecessarily large subsurface pipes also retain much more water between rain events. Pvc pressure pipes are used and their sizes are determined by the region’s 1:20 year rainfall intensity, the region’s weather patterns, the roof areas servicing each downpipe and the tank sizes. Melbourne has a minimum 1:20 year rain intensity of 2.2mm (rounded up) average over a five minute duration but about 95% off all precipitation is either drizzle or showers. The long term average for annual heavy rain events is five per annum. I don’t know the roof areas servicing each downpipe but your total tank storage capacity will be about 4,400 litres. Because a Supadiverta diverts water to a bottom valve, its hydraulic head is governed by the tank’s water level, not by the height of a vertical riser above the tank. More hydraulic head = efficient flow rates with the use of smaller pipes. It must be noted that it requires x4 the hydraulic head to double the flow rate, the reason why a small hydraulic head is still surprisingly efficient when a tank is nearly full but to maximise efficiency, 45 degree wye fittings should be used in preference to 90 degree tees to minimise friction losses. DP(a) I would use 20mm (23.7mm ID) pressure pipe vertical drops that merge to a single Class 9 25mm (30.5mm ID) pressure pipe. This pipe would merge to a 40mm 45 degree wye that also merges with a 25mm pressure pipe from DP(B). The 40mm pipe would be diverted under the path. DP(C) I would also use a Class 9 25mm pressure pipe to divert water from this downpipe to ensure an adequate and regular flushing velocity. The pipe would merge to a 50mm pressure pipe wye that will also merge with the 40mm pipe. The short 40mm pipe will have minimal friction/pressure loss and will recharge the DP(C) 25mm pipe’s friction losses as it will act as would a water tower. The 50mm pipe will use a flexible UV stabilised hose to connect to the 50mm valve Sediment trap. A simple sediment trap that would capture bed load would be best fitted near the round tank. The Supadiverta has an internal 750 micron filter on a 50 degree slope but a surprising amount of fine grit and other matter still finds its way into the wet system pipes. The sediment trap collects this and flushing entails minimum water loss. 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. That was always going to be a challenge and a test of patience. Full marks to your mate. Did you discuss the wet area near the trampoline? 16 17426 This certainly doesn't look good. I would be engaging with an independent inspector to have a look at this. As for the unscheduled site visits, most builders are quite… 1 28442 |