What’s a Pressure Switch?
A well water pressure switch helps to control a well pump system which helps provide water to a household or business. The pressure switch has a spring on the inside that’s connected to electrical contacts. As time goes on, the spring becomes weak and the electrical contacts wear out which can make it seem that your pump isn’t working quite right.
It is used with submersible well pumps and jet pumps.
What does 20/40, 30/50, 40/60, 50/70, and 60/80 mean?
These numbers represent the pressures that your pressure switch is tuned to in the water line. The first number is what tells the pressure switch to send a signal down to your pump to turn on. The second number tells the pressure switch to send a signal down to your pump to turn off. You may hear the terms “cut-in pressure” and “cut-off pressure” = cut-in pressure / cut-off pressure.
When you open up a faucet the pressure drops. For example on a 40/60 pressure switch (most popular option) a home’s water pressure sits at 60 psi. When someone opens up a faucet, it goes from 60 psi down to 40 psi. The pressure switch senses the drop to 40 psi and that’s when it sends an electrical signal down to the pump to turn on. When you turn the faucet off, the pump will continue to pump until the pressure gets back to 60 psi and that’s when the pressure switch will send a signal to your pump to turn off.
Side Note: Your water pressure tank should be set to 2 psi below the cut-in pressure (low number). For example 40/60 psi, the tank should be set to 38 psi.
What does a Low Cut-Off Pressure Switch do?
A low cut off pressure switch turns the pump off in the event that the water pressure in your lines drops lower than the cut-in pressure (low number). Imagine that there was a leak or break in your water line. This would cause the pressure in your line to drop and your pump to kick on and stay on which could lead to flooding of your home or business. The low cut off pressure switch would turn the pump off if the pressure drops 10 psi below the cut-in pressure (low number). Think of it as a nice piece of protection.
What does a Heavy Duty Pressure Switch do?
It does the same thing as a regular non-heavy duty pressure switch except the build of it is a little more heavy duty and recommended to use with pumps that are 2.0 hp to 5.0 hp. Pumps that are 1.5 hp and below you can just use the regular non-heavy duty pressure switch.
How to Troubleshoot a Pressure Switch
How to Adjust the Rating of Square-D 9013 Pressure Switch from Schneider Electric
How to Fix Air Leaks in the Square-D 9013 Pressure Switch from Schneider Electric
The industry standard for controlling electrically driven water pumps. Low Pressure Shut-Off operates at approximately 10 PSIG below cut-in and will turn off the pump.
For optimal efficiency, set your pressure tank air charge 2 PSI below the cut-in pressure. (28 PSI)
Model # | 9013FSG2J21M4 |
---|---|
Manufacturer | Square-D |
Shipping Weight | 2 |
Flow Rate | 0 |