My pump is losing prime overnight. Based on my understanding and reading here, this almost always is said to be caused by a suction side leak. However, there are no bubbles in the pool. The pump basket does seem to have a different sound than before acting somewhat like air is getting introduced. So I do plan to replace the o-ring on the lid.
However I do know that I have a leaking spider gasket as I can see small drops of water that come out the waste. It has been this way for awhile. Is it possible the spider gasket is causing the loss of prime?