Hi we have a tender with a builder and he has on it a water tank with a Vada pump, are these brands any good?
Cheers
Browse Forums Eco Living Re: Vada water pump 2Jul 08, 2016 12:26 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: Vada water pump 4Jul 08, 2016 7:07 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: Vada water pump 6Jul 08, 2016 11:20 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: Vada water pump 7Jul 09, 2016 9:02 am Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: Vada water pump 8Jul 09, 2016 12:15 pm Every 1 metre head = 9.82 kPa but there will be some friction losses depending on the length and size of the pipes and the velocity through those pipes. Most modern washing machines also have solenoids that have a minimum pressure requirement to operate and this will also have to be known. You need X4 the head to double the flow rate but doubling a pump's flow rate requires X8 more energy. It is a bit late once a house has been built but doubling a pipe's true internal diameter increases the volume X4 but if the same head is used, the flow rate increases by approximately X6. 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: Vada water pump 9Jul 10, 2016 7:09 am SaveH2O Every 1 metre head = 9.82 kPa but there will be some friction losses depending on the length and size of the pipes and the velocity through those pipes. Most modern washing machines also have solenoids that have a minimum pressure requirement to operate and this will also have to be known. You need X4 the head to double the flow rate but doubling a pump's flow rate requires X8 more energy. It is a bit late once a house has been built but doubling a pipe's true internal diameter increases the volume X4 but if the same head is used, the flow rate increases by approximately X6. So if the working capacity of the pump is 200kpa I need 20M of head, I dont have that, I think I can only get 10M. ( I will have to see what WM pressure is) My problem is that if the pump fails or the power is off we can't wash hands or even flush toilet. That is a potential problem for me if I am In Melbourne and have guests in Tas. Once I built kindergarten with 500l tank on roof as redundancy so kids can have water if supply fails. I think I will stick with pump set up I have and just buy a new Davey pump and then set up a redundancy gravity feed system to take care of emergency. Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: Vada water pump 10Jul 10, 2016 11:31 am The only 3 other alternatives would be to either have a large pressure tank (very expensive), a roof tank that could gravity feed but also operate with a small pump when there was power or else have a solar PV system with battery storage. 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: Vada water pump 11Jul 11, 2016 7:43 am SaveH2O The only 3 other alternatives would be to either have a large pressure tank (very expensive), a roof tank that could gravity feed but also operate with a small pump when there was power or else have a solar PV system with battery storage. At Bunnings I just spotted 12V pressure pump. I will have a look if I can use it to build in redundancy to run off two car batteries and kick in case of power failure. I am interested in off grid solar but have not yet got around to have a serious look. I hope home storage batteries come down in price soon. I have also spotted $300 constant pressure pump but you get what you pay for. Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: Vada water pump 12Jul 11, 2016 5:06 pm The 500W Einhell pressure pump that Bunnings stock has a 20 litre pressure tank, a pre pump filter, 2 year warranty, full parts availability and at $299 represents great value. Well worth having a look at. The pressure tank is set at 20 psi which should draw down slightly more than 6 litres. If you have 6/3 flush cisterns, it should do two 1/2 flushes before the pump starts. If it doesn't quite manage to do two 1/2 flushes without starting, you can simply lower the pressure slightly. Another alternative is to fit another pressure tank in tandem to increase the draw down. I paid $190 for a 60 litre Pressure Wave tank two years ago but that was a good price...the next best price was $210-220. It has made a huge difference because it is used to supplement an existing pressure tank. I am not sure what the current prices are. They have given this pump the best chance of having a long life but fitting the filter and pressure tank. Numerous short start/stops on a strangled pump accelerate pump wear but a pump will operate at maximum efficiency when recharging a pressure tank. Another cause of premature pump wear is when the suction line is fitted to an elbow that is fitted directly to the pump. This is very commonly done. A straight section of suction hose that respects at least 8 diameters should only be connected to the pump. I mentioned earlier that having the tank's pump draw valve fitted at the very bottom of the tank is another very common mistake...but great if you want to draw the worst quality water in the tank from the sediment layer. I am astounded that so many tanks are plumbed like the one below. 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. 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 28477 |