Quote:
Originally Posted by Kronk
There is a 1" bulkhead behind the rocks that feeds the closed loop pump. And 2 outputs from the closed loop pump.
The bubbles are definately coming from the closed loop and not the sump pump.
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Assuming that the line was primed properly and there isn't air sitting someplace occasionally being dragged into the pump, you might want to try plugging the C/L returns and then while under pressure the leak might reveal itself.