Air in Return lines

[PhantomAndy]

I'm not a plumber - so take this strictly as a guess...

The water flow in your pipes should be sufficiently strong to move any air that collects in the pipes out of the system with no problem.

I suspect that you are pulling some air into the system somewhere. Most likely this is happening on the suction side of your pump.

I would suspect a connection made somewhere in the plumbing coming from your skimmers or main drain.

However you say it's only in 2 of your 3 returns. Are you sure there are no bubble at all in the 3rd return?

I just can't imagine that the pressure and speed of the water won't clear any standing air in the pipe. I truly suspect you have a fitting that isn't sealing well somewhere on the suction side.

[isdsms]

I just started having the same problem and am quite perlexed by it. I am thinking that it might be the gasket in the pump. Is this a possibility??