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

    May 12, 2011, 03:50 PM
    How does waterpump and expansion tank work
    Domestic water system residence
    jlisenbe's Avatar
    jlisenbe Posts: 5,020, Reputation: 157
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    #2

    May 12, 2011, 04:06 PM

    Water pump pumps water under pressure into pressure tank. When pressure reaches a certain point, say 50#, then the switch turns the pump off. Water is stored under pressure in the tank, waiting to be used. As water is used, the pressure drops to a set point, at which time the pump turns back on.

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