I just installed solar panels on the roof. They are installed on 2 different levels. Everything is sloped in the right direction - but I keep getting alot of air returning to the pool.

I can't find any help in the installation directions for this. I'm thinking it might have to do with the location of the vacuum relief. It is currently on the higher panel set.

How does the vacuum relief work? Could The pump not be putting enough pressure on the sytem to close it? My filter normall operates at 10 PSI (Jucuzzi - 2 big filters) - with the solar - it is up to 18 psi. I think someone also mentioned moving the vacuum relief around in the system -- to resolve the problem. ( but I don't understand the mechanics of how that would work?).

Thanks!