"James Nipper" wrote in message
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At a vacation cabin in the mountains , I get water from a nearby spring.
At the spring I have a reservoir, and a submersible pump is hung vertically
in that reservoir. The system has worked well for many years. The pump is
"about" a 1 hp rating, but it could be as big as 1 1/2 hp.

(...)

I would look for trash obstructing the pump intake.

MM