I need help to solve this puzzle. I have a 33K gallon pool with sand filter. When I start the pump, within minutes I will see pool of water near my sand filter. I don't see any leak. I have inspected the sand filter drain plug, multi port valve, pump, but I don't see anything. If I stop the pump, within hours the water dried out.
It was not there last year. The pool was professionally closed, but I opened it. I used teflon while opening.
Thanks for helping.