Browse Forums Eco Living Re: My rainwater system design 4Apr 09, 2016 7:03 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: My rainwater system design 5Apr 10, 2016 8:28 pm Thanks for all the info on that, it helps fill out more details in addition to your posts I've been reading in other threads. It's a shame that your new diverter isn't ready yet, but it comes down to what's available. I did like the look of the supadiverter, but as you mentioned before, it was going to have troubles with the head. I thought that the leafeater ultra wasn't too bad in head loss due to the rear exit design being part of the height, but the "advanced" does lose less. Our downpipes from the builder are 75mm round, which seems to be the most common in new builds in Adelaide. It seems silly through, especially seeing as the fittings for 75mm are expensive. I was planning on changing them to 90m when adding the diverters I'll have to research the fittings a bit more, but I'm still wondering a bit about the drain pipe for the sediment trap. Some pictures I've seen show 40mm (DWV?), and others smaller, down to 20mm or so. Is the size on this important? I imagine that smaller tube will flow faster, but eventually have a higher risk of blocking. Do you need to be careful not to have sharp elbows on this line? I went to a place that sells and installs tanks the other day. I asked what leaf diverters they had, and at first he didn't know what I was talking about, and then said that they never used them. Similarly, they wouldn't think to use mesh or flap valves on the overflow, and no thought of anything but the simple wier type overflow connection. The industry just seems unaware of the different things you can do to improve rainwater collection. Re: My rainwater system design 6Apr 11, 2016 3:04 am oneJohn I wonder if perhaps the sediment purge should be reduced down to 40mm at the bottom of the trap, but don't want to make the design for the plumbers too complicated. When it reaches ground level, I'll then have to terminate it to some sort of valve that will point in a sensible direction to purge the silt. To reduce 100mm DWV to 40mm, you just buy a 100mm x 40mm pipe reducer. This will fit into the DWV tee or 45 degree wye junction. Note that like many pvc fittings, they can also be referred to by another term as per below. http://www.pvcpipesuperstore.com.au/100 ... -498-p.asp We usually use a 100mm wye fitting for the sediment trap because the 'trap' opening is larger and the bottom fittings don't go as deep. Finding a wye with an inspection opening can be difficult as the major manufacturers don't make them and they are not cheap. The wholesaler that I get mine from has also been out of stock now for some months. The only use for the opening is for 'insurance' in case a large object travels down the pipe and lodges against the smaller opening but if you have leaf diverters, this won't happen. Tees with an inspection opening (IO) are easier to find and Holman make one but the retail prices vary wildly...from $15 to $40. The first 100mm DWV trap that I bought a few years ago was an iplex tee with an IO and I paid well over $30 at Reece. I saw the same one a few weeks later for half of what I paid. The iplex one is shown in the link below. http://www.comhardware.com.au/Product/J ... cat=136140 If you are comfortable with not having an IO, just use a (much cheaper) plain wye junction or a tee. I have been testing an improved version of the current wye junction sediment trap that eliminates the 45 degree elbow and the pipe reducer. I have always been a bit annoyed about the pipe reducer's design because it has the potential to build up debris in the cavity around where the smaller pipe fits. If you look at the inside area, you will understand why. This material is however subjected to flushing and poses no risk but I don't like it because it isn't as good as it should be. The reducer will fit directly to the wye junction (and eliminate the larger elbow) and a 40mm M F 45 degree elbow then fitted to the reducer but the accumulation of debris is greater because it is on a slope as opposed to being horizontal when fitted after an elbow as per the diagram below. I was thinking of devising a way to fill the reducer's inside wall cavity with some readily available food grade substance so that no debris was trapped but I think that suggesting this to others would be impractical. I am now playing around with having a 100mm x 50mm invert taper fitted directly to the wye junction and either a 45 or 90 degree M F elbow fitted to it. A 50mm DWV female iron adapter would then fit into the elbow and a 50mm x 25mm poly bush would then fit to the adaptor. A 25mm poly director would then fit to the bush, that then allows a 25mm poly pipe to be used. This fitting is about 10mm deeper than the current one but the captured bed load has a smooth downward transition and the poly pipe is more versatile and cheaper. There are several other options. 100mm x 50mm inverted taper. DWV female iron adapter. Threaded poly bush. Poly director. 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: My rainwater system design 7Apr 12, 2016 8:53 am AS 2870 covers the requirements for reactive soils and houses. The second link in particular is a very good read. http://www.stormplastics.com.au/files/A ... enotes.pdf http://www.stormplastics.com.au/files/S ... arJuly.pdf I second that... very good read indeed. So this is what should be specified on drainage plans for reactive sites? How many builders, designers or surveyors would even know? Re: My rainwater system design 8Apr 12, 2016 12:49 pm You can also throw plumbers, architects and hydraulic engineers into that mix for all manner of things. 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: My rainwater system design 9Apr 12, 2016 1:10 pm That's for the extra details. That helps make it clear. With the flexible poly pipe it should be easier to find a neat way to terminate it above ground. There is some quite serious variation in the cost on the tee with inspection opening. Bunnings have the Holman one for $40, and there's this place that has one for $11: http://www.pipeonline.com.au/listProduc ... S+JUNCTION It's probably not worth it after the shipping, but it might be worthwhile to get a few things at once. Re: My rainwater system design 10Apr 12, 2016 3:51 pm If they are in the trade Liliana - plumbers, electricians, concreters, builders etc and building on reactive soil, then as professionals they should know. Not to do so is just ignorant and amateurish. Stewie Re: My rainwater system design 11Apr 12, 2016 3:57 pm Onejohn, Pipeonline are wholesalers but the Bunnings one is very expensive. Postage is a trap with some online traders and you have to be careful of their charges. It wouldn't be worth buying a one off plumbing fitting. Most irrigation stores are much cheaper than Bunnings and other hardware stores. 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: My rainwater system design 12Aug 21, 2016 5:10 pm Hi John Are you done, moved in and have full tanks? In the end did the builder install 75mm downpipes? With all this rain I've been cursing that we don't have a roof or downpipes to start filling tanks! We hope to at least have the slab poured by Christmas on our H2P site in Adelaide. Im interested to hear how you have got on. Once you know the basics, the rest is easy. Read my post in the thread linked below. viewtopic.php?p=1919271#p1919271 2 19497 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 |