Report "I have a 1 hp Sta-Rite Centrifugal Pump, MPRA6#-147L. When on, water is coming it but the area with with filter is not filling up. I get no pressure on the filter and very little water is going to the pool. The o-ring on the lid to the filter area of the pump appears to be good and there is no leakage out of the lid when the pump is running. What to do?"