Ok, that makes sense. We had unusually heavy rain this winter and we had water in our basement for the first time since we built the house 13 years ago. I would still think this ground water would be on the bottom of the pool and not the slope, but I'll accept that.

I drain the water off the cover with a hose and actually thought that may have happened, but when I took the cover off the pool water was clean and the cover didn't have a hole. The water is well below the height of the multiport at this point. The only line that low is the drain line.

I'm going to uncover again in a few days to check the water level against the mark I made on the liner to see if it's stopped leaking. Can I pressure test the lines at this point in time? Is this something I can do?

thanks