henward Posted February 27, 2013 Report Share Posted February 27, 2013 approx how many PSI is a return pump? say the pump is a 6000LPH or something. what psi? reason i ask is that i have a check valve to prevent backflow, and it needs 0.5psi as a minimum pressure to work. Quote Link to comment Share on other sites More sharing options...
livingart Posted February 27, 2013 Report Share Posted February 27, 2013 lot of variables to take into consideration size of pipe and height of return line into tank will help Quote Link to comment Share on other sites More sharing options...
Ira Posted February 27, 2013 Report Share Posted February 27, 2013 approx how many PSI is a return pump? say the pump is a 6000LPH or something. what psi? reason i ask is that i have a check valve to prevent backflow, and it needs 0.5psi as a minimum pressure to work. Look at the flow chart. 2 feet of head is roughly 1 PSI. I'm assuming that means that it won't open with less than .5psi? So as long as your pump has a maximum head of 1 foot it should provide enough pressure to open the valve. Which...6000LPH I'd imagine it has far more than that. Quote Link to comment Share on other sites More sharing options...
alanmin4304 Posted February 27, 2013 Report Share Posted February 27, 2013 It could also mean that it stays shut with 0.5psi so it will stay shut if it has a foot head of water against it. Since the sump is usually at the bottom it should work if the non return valve is also at the bottom. Quote Link to comment Share on other sites More sharing options...
henward Posted February 27, 2013 Author Report Share Posted February 27, 2013 i have a Hansen CV25 check valve. Quote Link to comment Share on other sites More sharing options...
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