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

    May 20, 2012, 03:35 AM
    Water system pressure tanks how do u know if they are working correctly
    I have a pump that won't shut off. I have replaced the pressure switch it still running unless I touch the switch or shut off power to pump. Upon re-powering the pump pressure rises to 40 (20 /40) but keeps running right at 40. How does the water system pressure tank work and how do I tell if mine is working? On island in NH and want to under stand system so I can adjust or fix. By putting on tire pressure gage will I be able to read the tank pressure. Tank states it should be 28psi can I bycicle pump up the pressure to 28 psi? If this maintains pressure will it effect the shutting on off the pump?
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #2

    May 20, 2012, 04:14 AM
    How does the water system pressure tank work?
    See the image I've put up.
    how do I tell if mine is working?
    Pop the air valve on top of the tank, If water comes out you have a ruptured membrane. The tank should be charged at 2 PSI UNDER the cut in point of the control box AFTER the breaker's shut off and a cold water faucet's opened up to bleed off the pressure.
    Tank states it should be 28psi can I bycicle pump up the pressure to 28 psi?
    WRONG! Your tank should be charged at 18 PSI.
    I have a pump that won't shut off. I have replaced the pressure switch it still running unless I touch the switch or shut off power to pump. Upon re-powering the pump pressure rises to 40 (20 /40) but keeps running right at 40.
    Sounds like you have a faulty foot/check valve that's not holding pressure. Replace the check valve and let me know the results. Good luck. Tom
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    jlisenbe's Avatar
    jlisenbe Posts: 5,020, Reputation: 157
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    #3

    May 20, 2012, 06:01 AM
    it still running unless I touch the switch
    That's rather strange. Is your pump above ground or in the well? Why did you replace the switch?
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