Well I'm about to loose my mind or what little bit I Have. We have spent yet ANOTHER day working on this pump. Came out to vacuum this afternoon and there was very little suction and very little water coming out the backwash. Took everything apart again, drained the tank and reconnected. Very low output. Turned it to recirculate and it throws great. We are so frustrated and fed up. Everything worked great when we set it up at the beginning if the year. Pool was so clean, hardly had to vacuum, skimmer kept all the leaves and debris out of the pool. We were amazed...now not so much. Do I need to just call a pool service and have someone come look at?? We have spent WAY more time working on the sand filter than we ever did on the cartridge filter....not the way I want to spend the rest of my summer....