When you say check valve I assume your referring to an above ground
check valve probably somewhere near the pump inlet. If so the problem
is most likely the FOOT valve at the bottom of the well pipe OR there
is a small leak in the pipe somewhere above the foot valve.
I agree that the pump itself is probably ok.

George


Gus Schick wrote:
My lawn irrigation system is fed by a well. The pump will not hold a prime
overnight. Works fine once I get it primed, but that's a hassle. A pump
man replaced the check valve but that didn't do the trick. He says the
problem must be in the well pipe and he's pretty much washed his hands of
the problem. He pooh-poohs the idea that the pump itself could have
anything to do with the problem, he says it has to on the well side of the
check valve. Could it be the pump? and if not what would cause the system
to lose its prime?

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