I have a deep well and I've always had the pressure set a little higher than standard. The pump pressure valve went out about 6 months ago and when they put in a new one I had them set it higher again. It appears to be turning the pump on about 45 PSI and off at 65 PSI. The WH is about 15 years old. Do you think setting the pump control back to 40 on and 60 off, like factory specs, would help? I wonder why it took so long to start leaking.