have a new pump Sta-rite Max-E-Pro & Jandy valve installed last year. Using a Sta-rite System 3 sand filter. Pool is about 18 years old, below ground fiberglass, 33,000 gal pool.
Had the OUTLET fixed about 3 years ago, crack in the PVC. Leak detection found it, return was OK.
So, this year June 2014, just got the pool open, lots of air in the basket, rolling water and air, lots of air bleeding off in the filter after 1/2 hour.
All connections checked, O rings etc going into the basket, water tested the fittings. I did install a " eye" on the exit into the pool which helped by causing some back pressure but didn't solve it completely.
The pool does hold 4 psi on the pump gauge OVERNIGHT, while pump is turned off and no loss of water in the basket, so it seems to be holding pressure and I assume no underground return leaks.
Pump runs at about 17 psi. with the " eye" causing backpressure, about 12 psi without.
What next ? Any thoughts ? The normal suspects are addressed, right ? Lost.
A bit confused in Colorado-