If I want to do two story residential and commercial with 300’ hose at 1/4" with no pump just water pressure coming out of the faucet, will that give me enough water pressure? And will it give me at least 1/2 gpm?
What Happens if I need to have lets say 600’ of hose, I assume that commercial buildings have more water pressure?
If you use 600’ of hose you’re crazy…you are gonna be so ****ed off rolling that hose every day! Besides…supposedly you lose 1 psi per foot of hose.
I have seen that many times before-but dont seem to make much sense because on a 300’ hose you lose 300 psi? Naaaa. But at 600’ youre gonna get next to nothing comming out of that hose without a pump. 300 is fine and will get most jobs done without a problem.
Why not try it on your own house? Extend your pole and see what happens. My commercial jobs always seem to have almost double the psi then a res job. But be careful, I hooked up my PSI meter to one commercial job and it broke the meter. The meter was rated for 100psi which I thought at the time I would never see higher then that. But I was wrong. My machine gauges said the PSI was 180. I’ll tell you this, it was interesting to see the hose stiffen up when I turned on the water.
If you lose 1psi for every foot of hose then at the end of 100’ you would have no psi if you are only allowing 45 psi into the DI tank?
Aren’t you supposed to only allow 45 psi into the DI tank so that your don’t burn through your DI?
Also how much water per minute should be coming out of the WFP so that you don’t waste your DI but can clean well, njones says 1 litre, how do you regulate it so that you can determine that rate of flow?
You don’t loose 1psi per foot,… that’s just crazy talk! The longer the hose run the more resistance/back pressure there is, but 600’ or more is easily achievable with 100psi of pressure. The real place where PSI is important is height. A 40psi pressure will push water up a 45’ pole, but not much higher. For work above 45’ a 60psi minimum pump is a good idea.
Most DI tanks in Europe are rated to 150PSI or more, and I assume they all come from the same factory in China, so nothing to worry about there.
Flow rate should be between 1 and 2 litres per minute,… any more is wasting water unless its a really dirty job or you’re cleaning cladding. Even on the really dirty jobs you get to a point where more water doesn’t make the job easier or quicker. Hot water is the way forward for that kind of work. For guys using DI only reducing water usage can save a lot of money and is much more environmentally friendly too.
Flow rate through the DI tank depends on the size of the vessel. The bigger the vessel, the higher the flow rate that is achievable without the output TDS rising. An 11 litre vessel will cope with 1gpm easy,… but the bigger the better,…
A motor speed controller (another advantage of using 12v electric pumps over gas ones) that allows complete control over the pump speed and pressure cutoff point. here’s a cheap (NOT WATERPROOF) one of ebay, but Reach Higher Ground do a proper varistream for $230 odd.