I have 3 x 300FT wells in series. My ground loop pressure keeps dropping, but my HVAC company says it's not concerning. They'll goose it up to 68 PSI, then over 6 months it'll drop to 20 PSI. Then they goosed it again to about 68 PSI, then drops down to 30 PSI over 6 months.

I'm not concerned about a leak as it is a large ground loop to pressurize through. My question is how does that PSI equate (if at all) to efficiency? I bought a device to pump the pressure up myself so I can keep it close to 68 PSI all the time. My question is how much will that help my efficiency? (basically am I wasting my time to obsess over it being close to 68 PSI).

FYI, my street water pressure is 68 PSI which is why I can only get it to there.

Thanks,

John