Hello guys here is the problem. I moved my pool equipment closer to the pool for convenience. It was 70 feet away before, now it is like 25ft. I install a Hayward DE filter 6020 and a Sta-rite Dura Glass pump of 1.0hp. Before it was a sand filter with a unknown sears pool pump 1.0hp from the 70's i believe. Well to go to the point the filter shows no sign of air leak anywhere. I spray a soapy solution every where on the suction lines and it didn't suck in the bubbles. In the pump basket there is few or no air bubbles sign. what else can cause this problem? maybe the suction lines is clog a little?