Over the couple of days, we've noticed a significant drop in water pressure. We have a well that's about 300 feet deep. I read another person's post regarding low pressure and TONY recommended turning up the pressure by turning the 2 screws that control when the pump turns on and off. I noticed that my pressure valve doesn't move. I turn the water on and wait for the pump to turn on, but the pressure valve doesn't move from 35. So, how do I know how much to turn the screws? Should I even be turning the screws? Is there something else wrong?

If your pressure gage's stuck replace it. You're getting false readings. Let me know when you have a new gage and what the readings are when the pump turns on and when it shuts off. Regards, Tom

"Over the couple of days, we've noticed a significant drop in water pressure."

How have you noticed this from reduced volume coming out of faucets, or from simply looking at the gauge?