BOught one of those polar is pressure gauge today and everytime It is plugged the pressure is less than 10 psi. Impeller is brand new, new pump, and new seals. Personally cleaned all the filters individually. Pressure at the filter is normal at 10-20psi. Polaris mesh filter is clean, polaris sweeper already taken apart and inspected. Call a third pool company to come over and inspect, guy said my problem is weird but he will check it out.