]i have done everything i could to figure this problem out and i really need some help. It all started with a dirty Pentair CC200 pool filter . I replaced the filter and noticed i did not have enough water pressure, so i replaced the o-ring in the pump motor, the o-ring in the valve, the o-ring in the filter cap, still the same problem. not getting enough water in the filter PSI reads 0 (replaced the gauge). i opened the breathing valve and notice the water does not reach but half way inside the filter , so not getting water enough water pressure. the water level at the pump sunction side looks normal. any advise that might help.