Browse Forums Owner Builder Forum 1 Dec 27, 2013 5:47 pm Owner Building at Jimboomba Woods in Logan City Qld. Blog : http://bandlnewhomebuild.blogspot.com H1 thread : viewtopic.php?f=38&t=68283 . Re: 20 or 25mm water meter on trickle feed supply 2Dec 27, 2013 6:38 pm The Harder You Try - the Luckier You Get ! Web site http://www.anewhouse.com.au Informative, Amusing, and Opinionated Blog - Over 600 posts on all aspects of building a new house. Re: 20 or 25mm water meter on trickle feed supply 3Dec 28, 2013 1:17 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: 20 or 25mm water meter on trickle feed supply 4Dec 28, 2013 9:27 am Owner Building at Jimboomba Woods in Logan City Qld. Blog : http://bandlnewhomebuild.blogspot.com H1 thread : viewtopic.php?f=38&t=68283 . Re: 20 or 25mm water meter on trickle feed supply 5Dec 28, 2013 9:39 am Owner Building at Jimboomba Woods in Logan City Qld. Blog : http://bandlnewhomebuild.blogspot.com H1 thread : viewtopic.php?f=38&t=68283 . Re: 20 or 25mm water meter on trickle feed supply 6Dec 28, 2013 9:52 am For the trickle flow 20mm pipe should be Ok. Its worth going to a larger pipe (such as 25mm) for high flows such as feeding the house from the pump. The Harder You Try - the Luckier You Get ! Web site http://www.anewhouse.com.au Informative, Amusing, and Opinionated Blog - Over 600 posts on all aspects of building a new house. Re: 20 or 25mm water meter on trickle feed supply 7Dec 28, 2013 10:04 am bashworth For the trickle flow 20mm pipe should be Ok. Its worth going to a larger pipe (such as 25mm) for high flows such as feeding the house from the pump. Sounds like a plan to me. Thanks for the quick reply. Owner Building at Jimboomba Woods in Logan City Qld. Blog : http://bandlnewhomebuild.blogspot.com H1 thread : viewtopic.php?f=38&t=68283 . Re: 20 or 25mm water meter on trickle feed supply 8Dec 28, 2013 12:10 pm bpratt I only wish we did have the option.... well we do actually, but still have to pay the same if we don't connect. /quote] bpratt Is it worthwhile to run 25mm pipe from the 20mm meter, or being on trickle feed stick with 20mm for the 100m up to the house, and just run 25mm from the water pump on the tank to the rest of the house? Bummer! I assume that the quarterly charge is fixed, that is, it doesn't vary as per the volume of water delivered. Even a trickle of 1 lpm would give over 1,400 litres per day and one would assume that the trickle feed would be greater than this. If you use Blue Stripe poly between the pump and the house, the internal diameter (ID) will be roughly 21 mm as this pipe is measured as an outside diameter (OD). A 21 mm ID pipe has a volume of .346 litres per metre. You can use this to determine the metres per second velocity at certain flow rates. This is a simple but effective way to determine the suitability of a pipe's size in relation to the pump. Many people with larger pumps have undersized pipes. Class 12 pressure pipe has an ID of 29.5 mm while the class 9 ID is 30 .5 mm. PVC pressure pipe is easy to use, particularly when Clearpond Pondflex (black corrugated UV stabilised) tube is used for the flexible couplings. This is measured as ID. The 25 mm Pondflex has a pressure rating of about 680 kPa from memory. Other factors obviously also come into play such as the run distance Vs friction loss consideration plus the tank's location given that the land is on a slope. Re the pump, if it is submersible, have it raised off the floor or placed in a shallow container to prevent it from vacuuming the tank's floor. If it is external, don't have the suction hose connecting to the pump via a 90 degree elbow fitted directly to the pump's suction side. I see this a fair bit and cavitation can be a b!tch. 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: 20 or 25mm water meter on trickle feed supply 9Dec 28, 2013 1:11 pm SaveH2O I assume that the quarterly charge is fixed, that is, it doesn't vary as per the volume of water delivered. Yep, fixed price every quarter, even if we did not connect up ! SaveH2O Even a trickle of 1 lpm would give over 1,400 litres per day and one would assume that the trickle feed would be greater than this. I sure hope so, and something I'm not sure everyone is fully aware of with trickle feed, is that over a day you can still get quite a bit of water back in to your tank, and that's even if the flow is really just 1lpm ! SaveH2O Many people with larger pumps have undersized pipes. Class 12 pressure pipe has an ID of 29.5 mm while the class 9 ID is 30 .5 mm. PVC pressure pipe is easy to use, particularly when Clearpond Pondflex (black corrugated UV stabilised) tube is used for the flexible couplings. This is measured as ID. The 25 mm Pondflex has a pressure rating of about 680 kPa from memory. Still coming up to speed with the fact that piping is sold on a OD and not ID, so it's really a tad smaller that what you buy as such. SaveH2O Other factors obviously also come into play such as the run distance Vs friction loss consideration plus the tank's location given that the land is on a slope. It is the friction losses and head of water that I was originally concerned with at the start, but now I have to consider the fact that the tank is mostly buried, with the tank top being below floor level of the house (~1m) and at its closest point to the house it is around 4 or 5 metres away. SaveH2O Re the pump, if it is submersible, have it raised off the floor or placed in a shallow container to prevent it from vacuuming the tank's floor. If it is external, don't have the suction hose connecting to the pump via a 90 degree elbow fitted directly to the pump's suction side. I see this a fair bit and cavitation can be a b!tch. That was how it was done in our old house, 2 x 90 degree elbows to get out of the tank, and a couple more under the ground to the pump ! Personally I'd prefer the pump to be outside of the tank for repairs and easy access, than in the tank itself. Point taken about keeping the suction point off the bottom so it won't suck up the inevitable silt build up. Would you consider the idea of using larger than 25mm poly pipe, such as up to 40mm to go from the foot valve to the pump and from the pump to a point in the house, where it then gets distributed to the various outlets around the house ?? Owner Building at Jimboomba Woods in Logan City Qld. Blog : http://bandlnewhomebuild.blogspot.com H1 thread : viewtopic.php?f=38&t=68283 . That's a fantastic result! Happy you got it sorted out. cheers Simeon 6 8724 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 28436 |