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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