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    rigger71's Avatar
    rigger71 Posts: 1, Reputation: 1
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    #1

    May 12, 2008, 08:54 AM
    Shallow well pump
    It will build pressure but as soon as it shuts off at 38lbs. It drops to 18lbs. In about 1min
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #2

    May 12, 2008, 10:54 AM
    Quote Originally Posted by rigger71
    it will build pressure but as soon as it shuts off at 38lbs. it drops to 18lbs. in about 1min
    Two things would cause this. 1) A leak on the pressure side**or**2) a falty check valve that isn't closing right away. My bet's on door #2. Good luck, Tom
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