Question about Simer 3/4 Hp Stainless Steel Sump Pump

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Hammering sound at shutdown

Why does my 1/2 hp simer submersable sump pump make a hammering sound when its done pumping water? from jj

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It has a check valve to keep the water from going back into the pit when it shuts off, depending on how high the pipe goes up when it stops pumping the water closes the check valve in which the noise, unfortuintly there is no quick fix, even changing the check valve it could still make the sound

Posted on Jun 23, 2009

  • gary miller
    gary miller Jun 30, 2009

    the checkl valve is shutting,, keeping the water from cumming back in thru the discharge line, sorry about the noise but this is typical with some pumps and check valves



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