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    aces's Avatar
    aces Posts: 1, Reputation: 1
    New Member
    		  
    #1

    May 1, 2009, 06:17 AM
    Sump pump bang
    Just replaced a sump pump in my basement. Everything works well,except: when the pump shuts down the pump makes a banging noise for about 30 seconds. I am using a check valve with the pump. Thanks. aces
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #2

    May 1, 2009, 06:36 AM
    Noise is vibration. Feel around where the "thump" feels the strongest. My bet's on the check valve. Good luck, Tom
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