Hopefully, the installer of the pump and reserve tank put in some cutoff
valves in the system. If so, there should be a cutoff valve leading toward
the house. Close this. If the pressure rises on the gauge you mentioned,
you got a leak some place on the other side of the cutoff valve. If not,
could be the gauge or the regulator for the pump.
Another way using your hearing. There should be a garden hose outlet on the
reserve tank. Close the cutoff valve previously mentioned for a few
minutes. Drain the reserve tank to the ground outside the well house for
minute or so. Close the valve on the reserve tank feeding the garden hose.
Watch the gauge and listen for a clunk sound inside the well house. The
sound means the pump has finished pumping. There could be debris right at
the gauge entry point, trapped there. Close the hopefully existing valve
that leads to reserve tank from the pump surface outlet and regulator. Kill
the power to the regulator and pump. Remove the gauge and inspect, clean if
needed. Replace if needed. Reinstall the gauge. Activate power and open
the valve. If no change, you or someone knowing what they are doing adjust
the high pressure side turnoff point of the regulator.
Money don\'t wag the dog\'s tail.
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