I have a 2hp Jandy thats about 6 yrs old. Just recently it started to lose water only when shut off. I can see and hear the air as it leaks into the pump only when it is shut off. The pump is off about 16hrs at a time and the water level in the basket when it kicks back on is about 3 inches high or so. Again, it primes up and runs just fine, no air bubbles circulating around when running. I replace the entire lid assembly with O ring but that didnt solve the problem. Since the pump is otherwise running as it should, do I need to be that concerned?