Your shallow well pump motor, a 1/2 or 3/4-hp electric pump should have a pressure guage that is easy to see, and it should cycle from 50 down to 30-psi ..... when the needle gets down to 30-psi ..... the pump turns on and runs until the needle gets back up to 50-psi .... and then shuts off.
About half of all pressure problems are solved by replacing the foot valve at the bottom of the black pvc line, in the lake. The old valve grows a weak spring, and a new foot valve, made of pvc, for about $20 at Lowe's solves the problem. And, the foot valve should be elevated up off the lake bottom with a concrete landscape block and some yellow poly line, to help prevent sand or sediment from getting sucked into the system.
If that all doesn't do the trick ....then start thinking about replacing the old 30 or 40-gal water storage tank ..... they should last for like 20-years .... but not forever.
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... down and out, liv'n that Walmart side of the lake!
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