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My shallow well pump will not pump to 40 lbs pressure which is the shutoff setting. tHE MAXIMUM PRESSURE IS 30 lbs so the pump runs continuously. What is the problem ? Pump is Red Lion 1/2 hp series RJS, about 3 yrs old. Well pipe is about 40 yrs old, 25 ft deep, condition unknown.

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  • dgitlstudio
    dgitlstudio Aug 16, 2012

    My son's well has the same problem and new pump made no change. Our conclusion is the pipes from well to pump have pinhole leak letting in air which "cavitates" the pump. Temp fix was to adjust the pressure sw down so it would shut off. Working fine with lower pressure. This Fall we will dig up pipes and replace with modern materials. Hope this helps.

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Installed new shallow well pump still only can get to 30 lbs pressure. when i turn pump off pressure drops to 20 lbs right away and stays there

Posted on May 27, 2011

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Sounds like the impeller inside the water box on the pump might be getting worn out.  did you ajust the pressure switch to turn off at 39 psi will at least work until you get a new impeller,

Posted on Jun 25, 2009

  • Cameron loker Jun 25, 2009

    sounds like the impeller inside the water box on the pump might be getting worn out.  did you ajust the pressure switch to turn off at 39 psi will at least work until you get a new impeller,

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