Thanks Bob. I'm actually going to try to see if there might also be sediment buildup at the gauges. I already had sediment cleaned out near the switch.
If I were going to do this, would I simply switch off the jet pump, close the valve between the tank and pump, and remove the gauges (there are 2) to clean them, and then put them back on with some thread compound?
I believe that's what the guy did when we cleaned the line to the switch, but I wanted to double check before I do this.
As for the valve - I can open and close that, but are you suggesting that it's a problem even when open? Technically, this valve is between the pump and the pressure tank, but I'm assuming that's the same thing as being between the tank the switch - yes?