cottagefun
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I have a 200 foot long 1" PVC flexible pipe from the pump in the cottage out into the lake. About 100 feet is underground and 100 feet is in the lake. After not getting enough pressure during spring priming from my old Duro piston pump, I bought a brand new jet pump (again not building up enough pressure) and finally repaired the piston pump (again not enough pressure). By running another pipe OVERground bypassing the underground pipe, I determined the cause of the problem was the underground pipe. So I dug up the underground pipe. I couldn't find any leak or obstruction. There's only a 6 foot rise between the cottage and the lake. The only thing I can think of is that part of the flex pipe may have been lower then a straight line between cottage and the lake. Since I drain the line each fall before winter sets in, and the problem occurred during spring startup, is it possible that trapped water part way through the line could have caused both a piston pump and a jet pump to not prime properly.