Use a car tire pressure gauge to measure pressure.
Well expansion tank pressure setting.
Be sure to follow the proper requirements listed below and in th.
In a well system with a bladder style pressure tank the well bladder pressure should be 2 psi lower than the cut in pressure for the well pump.
This will let some air out and it will also tell the pressure in the tank.
The small and medium tanks have 28 lbs.
All new tanks come with a certain level of pressure already in the tank.
Release or add air as necessary to make the pressure 2 psi below the pressure switch pump cut in setting.
A detailed procedure for sizing diaphragm type expansion tanks is given in reference 1 as well as several other industry publications.
For example if your well pump pressure control switch is set to cut in start pumping water from the well at 30 psi then set the pressure tank to 30 2 28 psi.
Pressurizing the air side of the tank to equal the static pressure of the water at the expansion tank location and before adding water to the system.
Lower this pressure by allowing the gauge to release air from the tank.
For example if you have a pressure switch setting of 30 50 psi you pressure measured at the top of the tank should read 28 psi.
Selecting a poorly made pressure tank may result in more troubleshooting scenarios than necessary.
Psi and larger ones have 38 lbs.
This well pressure tank installation video shows the steps you ll need for this replacement.
Because the pressure tank is a core component of the entire well system responsible for regulating pressure and for easing the workload of the well pump the importance of selecting a the right well pressure tank cannot be overemphasized.
If the cut in setting is 40 then adjust the pressure tank to 38 or 36.
The pressure switch setting is the pressure at which the pump turns on to fill the tank up and the pressure at which the pump shuts off knowing the tank is full.
Air can be added with a compressor or bicycle pump.
Check pressure in the tank with your pressure gauge.
Add or release air until the pressure tank s setting is 2 to 4 psi below the cut in setting for the pressure switch.
The key concepts are.
