I have a Pentair WhisperFlo, 2.0Hp. There is constantly air in the pump basket, lots of little bubbles. I believe that this air is coming from the suction side. I see no leaks in the plumbing or the pump. The O-ring is lubbed & there are no visible cracks in the tip.
Any ideas as to what can be causing this?
Any ideas as to what can be causing this?