filtering time vs pressure

Johnny B

LifeTime Supporter
Mar 19, 2009
Charlotte, NC
My normal filter pressure is 19-20 psi.
When I run my Polaris cleaner, the filter pressure drops to 16psi, about a 20% drop.
Should I increase the total pump run-time by 20% to compensate for this or is turnover not really directly related to pressure?


TFP Expert
LifeTime Supporter
Apr 4, 2009
I would leave it alone. I psi drop would actually indicate your getting more flow..I think :scratch:

Bama Rambler

Mod Squad
TFP Expert
Bronze Supporter
LifeTime Supporter
Jun 22, 2009
SouthWest Alabama
I agree with Dman, leave it alone. There's nothing magic about 1 turnover. It's just a starting point. Some pools take more than one turnover to remain clear and some take a little less. It's really whatever works for your pool.


TFP Expert
LifeTime Supporter
May 3, 2007
Pleasanton, CA
Assuming nothing changed in the return side of the plumbing, a 20% drop in filter pressure is about a 11% drop in flow rate give or take. So running an extra 12% gets you back to where you were but then again, that isn't really going to make much difference anyway.