Tiny air bubbles in pump basket cover


Well-known member
Feb 10, 2016
Can't seem to get rid of these bubbles. Got all new gaskets on the cover and the bottom plugs. It seems with the dividers on the strain basket cover once a bubble forms it can never really disappear



Well-known member
Feb 10, 2016
So it is a 1.5 whisper flow, I used plumbers grease not silicone not sure if a difference and filter is pretty clean. When run on high they disappear a bit more but back to low and they come back

Texas Splash

Mod Squad
TFP Expert
LifeTime Supporter
Just make sure that grease isn't petroleum-based. Silicone lube is best for the rubber. My pump always has as few of those bubbles as well. I drove myself nuts trying to eliminate them completely checking all valves and fittings before the pump for a suction air leak. I know we would like for it to be perfectly clear of all air 100% of the time, but each pool is different. I usually do like you and kick it up to high briefly each day to purge them. As long as the water level doesn't drop significantly or you lose prime you should be fine. If you wish to pursue things further, checkout the link below.



Gold Supporter
TFP Guide
Nov 12, 2017
Central California
Pool Size
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
If the grease you used is oil-based, then that's bad. You need to clean that off thoroughly, from o-ring and from the two channels it sits in, and then use the right stuff. Here's the hows and whys of it:

My pump lid has the same ridges. There are always a few bubbles in it. Unless they get worse and actually build up over pump runtime, you can ignore them. I don't even know if mine go away eventually or not. Non-issue.