OK, so opened the pool this year and everything was normal for 2-3 weeks. Then, I suddenly stopped getting suction from the skimmer line. I cleaned all baskets and filters, since that is usually the issue. Still no suction. Assuming there must be blockage in the skimmer line, I used a hose bladder first and then a water ram. Water shot through with no problem and no evidence of debris. Then worried about a line break (even though we weren't losing any water), so we pressure tested the line--held the pressure just fine. So then we thought, maybe its on the pump side, and began to replace all gaskets, seals and the impeller. Pump was new last season and seems to be running just fine. Still no suction. At this point we're pretty stumped. Any ideas?
16 x 40 Viking Island Breeze II, 6 years old, fiberglass, gas heat, salt cell, led pool lights, two deck jets, two pool jets, auto cover
16 x 40 Viking Island Breeze II, 6 years old, fiberglass, gas heat, salt cell, led pool lights, two deck jets, two pool jets, auto cover