If your water pressure regulator is bad, ... It's not always necessary, but it is needed for homes that receive water with pressure higher than around 60 PSI.

Then, install your pressure gauge on an exterior faucet, turn on the faucet and read the pressure. Your home’s water pressure should be between 40 and 80 psi (pounds per square inch). How to Fix ...

The pressure regulator is usually preset to 50 psi. However, it can be adjusted anywhere from 25 to 75 psi with a simple turn of a screw, as shown above. To check the pressure, connect a pressure ...