I have a 3 way valve on the suction side of my pump that lets be choose between skimmers, main drain or both.
When "both" is selected, everything runs fine. However, if I change to either skimmer or main drain, air enters the system and your can see tons of bubbles run through the strainer and eventual out the Jets.
I assume this means a problem with the 3 way valve? It seems if there was a leak in the return lines it would show when "both" was selected. Should I rebuild/replace the 3 way or am I off base?
When "both" is selected, everything runs fine. However, if I change to either skimmer or main drain, air enters the system and your can see tons of bubbles run through the strainer and eventual out the Jets.
I assume this means a problem with the 3 way valve? It seems if there was a leak in the return lines it would show when "both" was selected. Should I rebuild/replace the 3 way or am I off base?