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 Sump pump revs up then loud thud
Author: NattyBohLight (MD)

Have lived in our house for 2.5 years and recently the sump pump has started to make a really loud sound multiple times a day. Had a handyman over doing other work and he looked at it and found a piece of styrofoam in the heck valve he ran it a bunch of times and said was working fine. Well a day later the the same issue with sound is back. I was able to manually make it happen to record on video but usually it does it on it own I assume when pumping water out. [www.dropbox.com][www.dropbox.com] Only way could show the video. (click Dropbox link for video)

Edited 2 times.

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 Re: Sump pump revs up then loud thud
Author: North Carolina Plumber (NC)

It sure sounds like something is hung in there an the motor's impellar is grinding against it.

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