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View Full Version : How does waterpump and expansion tank work


jebjeb
May 12, 2011, 03:50 PM
Domestic water system residence

jlisenbe
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.