House Water Pressure
You need to do at least two things initially to try to boost your shallow well water pressure...raise the cut-on air pressure in the pressure tank and raise the cut-on/cut-off pressure on the pressure switch.
To adjust the pressure tank:
Turn the pump off and drain the water pressure down to nothing. Then check the pressure in the pressure tank with a tire gauge. It should be two psi below the current cut-on pressure. (The pressure ideally should be about 20 psi apart, such as 30-50 or 40-60 psi cut-on/cut-off.) If it is too low for what you're tryng to raise it to, air up the pressure tank with a bicycle pump or portable air tank or compressor. It should be at 38 psi for the 40-60, for instance.
To adjust a pressure switch:
These vary, and as FatAugie said, the electrical connections under the switch cover are HOT, either with 120v or 240v, AND EITHER ONE CAN KILL YOU. I adjust my pump with the electrical HOT to the pressure switch because it's easier to adjust and I know what I'm doing, but IF YOU ARE NOT COMFORTABLE WORKING "DANGER CLOSE" WITH HOT ELECTRICAL CONNECTIONS, DO NOT DO IT! TURN OFF THE BREAKER OR UNPLUG THE PUMP (SWITCH), AND TEST IT BEFORE TOUCHING IT.
You will see either one or two threaded bolts sticking up with nuts on them. You turn the nuts down to increase the pressure. If it is only one threaded bolt, it will automatically be set 20 psi apart for the cut-on/cut-off. If there are two threaded bolts, the taller bolt will be the cut-on and the shorter bolt will be to adjust the cut-off. Adjust them down until your pump comes on at 40 psi (or whatever) and cuts off at 60 (or whatever).
If your well point is in good shape and not too clogged, and your pump is in good shape, these two adjustments may just do it for you.
You'll just have to experiment and work with it until you get the system to its best pressure. Your goal is to get the maximum pressure without causing your pump to labor.
Last edited by Mike Swearingen; 09-22-2007 at 06:28 PM.