You have high or low water pressure?...Let's talk PRV (Pressure Reducing Valve). This little unit is used to reduce the incoming water pressure down to a safe & usable psi (pounds per square inch) level. In this video I discuss what a PRV is used for, what it looks like, and ways to determine if it's time to replace your PRV.
https://amzn.to/3Dvj8zI (water pressure gauge)
https://amzn.to/3jngwwO (pressure reducing valve)