I have a sump pump in the basement that is working properly to drain the tank, but when it gets to the bottom, it just gurgles and continues to run and run. If I pound on the pipe it stops the pump, but once the tank fills again it keeps running. I believe it is a Rigid Pump and it does not seem to have a float. just a small black round box attached to the pump that has a cord coming out of it? Can anyone help?
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sump pump keeps running