Hi,

I've a 75ft deep well, a jet pump (1HP, manufacturer=Goulds), and a
32gal water tank. The well sanitary cap, pump and tank are completely
accessible and observable. I've noticed that the pump will come on at
least 1time in the early morning hours, long after everyone's asleep
and no water usage. I tried an experiment: I disconnected the pump's
electric, and closed the ball valve between the pump and the tank,
isolating the pump & well from the rest of the house. I watched the
water pressure gage on the pump go down 1psi every minute until I'll
lose the prime after a long while. Is this a definite sign of a bad
foot valve at the bottom of the well? Other than a leak on the hoses
down along/in the well, could it be anything else??

Thanks.

Theodore

Forgot to mention: it's a double-line pump, with two hoses going down
the well.