Pump priming problems


Well-known member
Apr 30, 2019
Austin, TX
Hi there.

I have two pumps 1) main-skimmers-returns 2) polaris+water feature. My main pump isn't priming and I can see bubbles in the return (this is atypical).

I replaced the lid seal/o-rings on both pump lids since I noticed they were old. And then I did a backwash to lower overall filter pressure, and then the main pump primed (upon backwash). And appears to be running fine for the moment.

Any thoughts on this? Am I good to go or is there a deeper problem at play?


Mod Squad
TFP Expert
LifeTime Supporter
Jul 7, 2014
Bedford, TX

The number one reason for a pump to not prime is caused by a problem with the pump lid O-Ring..

Based upon that, I would say you are good to go..

I assume that you used pool-lube on the new O-Rings... If not, you should have.


Jim R.