Question about Sta Rite 3/4 Hp Above Ground Pump Ne640
There is a screened check valve that should be attached to the pick up / suction side of the pump on the very end of the plumbing in the bottom of the well. If you have shut off the water output going to the home / what ever and the pump still drops pressure to zero as soon as it shuts off the shallow well foot valve is stuck open / has failed.
Some systems use both a foot valve and an in-line check valve to prevent the symptom you currently have.
Foot valve example:
If this valve has failed... there is nothing to prevent the contents of the pressure tank from dumping back into the shallow well.
I doubt you have a shut off on the pump suction side but if you do once the pump shuts off close this valve. I would bet your pressure tank holds the pressure. If you do not have a shut off valve... just feel for a rush of water in the suction pipe AFTER the pump reaches pressure and shuts off. If your feeling water flow with the pump off and the tank at pressure / loosing pressure the foot valve is bad.
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Posted on Apr 18, 2011
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