I was having an issue with low suction. I did a complete rebuild on my Pentair 3 HP Variable Speed Pump. Replaced the internal bearings. Bought the seal kit and replaced all O Rings and the shaft seals. Thoroughly cleaned out the cartridge filters. Replaced the O rings at the suction side of the filter as well as the large O rings that seals the two half's of the filter. Tightened the clamp that holds the two half's of the filter all while tapping it with a rubber mallet. I torqued the bolts on the pump to recommended specs. I did get a 10 PSI jump from 10 PSI before the rebuild to 20 PSI after. I released all the air from the top of the filter. I am still seeing some bubbles in the pump lid. I was wondering if that means I still have an air leak. Should I be seeing absolutely smooth water through the lid. so much so that you almost wouldn't be able to tell water is flowing through it?