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sump pump that goes thump, thump

Posted by d horswill on June 10th, 2001 09:52 PM

I have a sump pump and it pumps out the water ok, but when the motor shuts off, it goes thump, thump. sometimes it does it 4 or 5 times. I don't know why its doing this. its pumping the water out of the hole in the house and i can see it outside in the ditch where it empties out. Someone thought it might be the in-take valve? Do sump pumps have those? I'm stumped on now to fix my sump pump. Help!

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