I had no air leaks until I first vacuumed the pool, that's when it started. It's very small causes small spurts of air from returns, almost enough to not worry about, I thought it was just removing the little bit of air I introduced joining the full of water vaccum line to the skimmer input. I plan to re-silicone/lubricate the o-ring on the pump strainer lid. That lid was on there pretty darn tight and I had to use a strong amount of force to unscrew it.
But I noticed a VERY small leak of water around the main pump return line. The junction right above the pump output. If water can get out, air can get in. Pool store said - something that small, just put some plumber's putty around the union.
Thoughts on this or should I get in there and disassemble/check the junction. There are air bubbles in my pump strainer basket which is why I'm starting there. Shouldn't that be air free?
Took pump strainer basket out, cleaned the heck out of it (wasn't really dirty)
Scrubbed down pump basket mate top to lid
Removed O-ring from pump basket lid, scrubbed the heck out of it, inspected=looked good, lubed that o-ring up
Scrubbed the pump lid o-ring area
All this scrubbing was with paper towels only to not damage the o-ring or it's mating surfaces. Who say's SCUBA isn't valuable. Leak was from pump filter input lid, once I got that seal pristine, no more trouble.