Air bubbles - finding leaks with a stethoscope

[mwsmith2]

I use a 3/4" length of pvc that's about 3' long to trace down air in the system. Put one end to your ear, the other end to the pipe. You'll be able to hear the air in the lines. Once you get to where you can't hear the air bubbles, you've found your leak. I'd check your Jandy valves on the suction side. Those are notorious for leaking.

Michael