I bought a house about 5 years ago and has a 10 x 80 6' deep lap pool with a 5 x 5 hot tub totally separate no overflow or anything about 5' away. Pump went out as I was opening pool last year so didn't use it as well as it has seemed I have air leaks and had been struggling with it since we moved in. This year I have drained it for a deep clean pressure wash, it was in bad condition with algae etc... am looking at how it is plumbed and in some ways makes no sense to me. First, is all of the valves are old school ball valves so have talked with some folks that have said those could be culprit on the air leaks so am going to replace with Jandy's. As I am looking at the pipes, the pool and Hot tub are piped together, the hot tub wont stay full by the way and I think it is draining back into pool. Is there a reason for the pool and Hot tub to be connected? I have a complete separate 1 HP pump and cartridge filter on the hot tub with two air blowers and heater, and a 1.5 HP pump and DE filter for pool. Heater was as far as I know never intended to heat pool, I have no plan to use it for that anyway, it would be way to expensive! I have looked at some of the other posts here and most seem to pipe them together but the pool and spa are usually connected.