Good Morning Everyone,
I am new to the board along with being a new pool owner. This year I opened my girlfriends pool and have never done this before but everything is going well except for one strange problem. What seems to be happening is when the pool filter is running after a few hours the circulation/flow rate goes down dramatically. The pressure does not go up so I don't believe its clogged up and I have even cleaned it out once already and there wasn't much junk stuck in the DE. What I have noticed is if I shut the pump off remove the clear plastic cover on the motor where the basket is and put it back on the flow rate and circulation is great for a few more hours. It's almost like there is some kind of back pressure causing the pump not to pump much after some time. I don't see any air and there is plenty of water getting to the pump so I know that's not it. Any ideas on what the cause is would be greatly appreciated.