A leak puzzler for those who like to figure this stuff out:
I have a vinyl inground pool -- one skimmer and one return. There is a main drain, but it is not functional and is completely plugged.
Over the past few weeks, I've noticed that the pool has not been holding its normal level. It's been very hot here with little rain, so attributed the problem to evaporation.
I started adding water (from well) and then we just had a lot of rain a few days ago, but the water level dropped to about 2 inches above the bottom of the skimmer inlet, and then of course it just starts sucking air. At that point, I throw the vaccuum in the pool and circulate the water that way. The water level stays there.
Before the water level gets too low, I see no air at all in the pump basket. After putting the vaccuum in, I do see a little bit of air.
So basically water level drops about 3/4 inch - 1 inch per day until it reaches a couple of inches above bottom of the skimmer inlet and stays there. Any thoughts?