Unless you know exactly what you’re doing when you adjust a pressure switch you really should not be messing with a pressure system, those of us who do this work are trained and familiar with checking on other issues that may go unnoticed. We highly recommend that you have your water well system inspected and serviced every year by a professional,
However, I will answer your question Todd, I know you are in an area that’s difficult to get your system serviced. Let’s go through the complete steps and you will learn how to carefully adjust a pressure switch.
I would find 20-40 PSI to be an intolerable water pressure, no wonder your wife is complaining! Unless the pump’s ability is questionable your submersible pump should easily build lots of pressure.
Let’s assume that it’s a submersible well pump, if I remember correctly you’re running a deep well submersible pump system. For the most part 30-50 is the lowest pressure generally acceptable but 40-60 PSI is much better.
If by chance you’re running a jet pump system then I would stay on a 30/50 switch because your jet pump may not have enough capacity to build 60 psi, if the contacts don’t open the pump will just keep running while try to build pressure. Best to not take a chance with a jet pump system, to many variables.
First, connect a hose to the hose-bib (tap) at the bottom of the pressure tank and completely drain off the tank. Don’t go dropping the hose into a floor drain unless you’ve tested the drain and know it’s open, half the time they’re not tested and can be plugged with concrete. Close the valve but leave the hose connected as you’ll need to test later.
By the way Todd, if the pump kicks in at this point the power is NOT off… the well pump should not start-up while you are draining the pressure tank off
It’s a good time to check that the pressure gauge is working is correctly or install a new gauge, the nipple can become restricted or plugged. If it’s restricted just get rid of it… they’re simple to install.
The air in the tank should be 2 lbs less than the kick-on pressure (when the pump engages), if you’re currently at 18 lbs then you will need to add air when the tank is completely drained of water, if you are set at 40/60 then you’ll require 38 lbs of air not 18 lbs..