What is a water pressure regulator (PRV)?
A water pressure regulator (PRV) is a valve that automatically reduces incoming water pressure from the municipal supply to a safe operating level for residential plumbing systems, typically 50-80 PSI.
Municipal water systems in Greater Hartford often deliver water at pressures between 80 and 120 PSI to reach homes reliably. Without a pressure regulator, this high pressure can damage household fixtures, pipes, and appliances designed for lower pressures. A water pressure regulator (PRV) is a mechanical valve installed near the main water shutoff where the service line enters your home. It automatically reduces that incoming pressure to a safer range of 50 to 80 PSI.
The regulator uses an internal diaphragm and spring mechanism to sense system pressure and open or close as needed, maintaining consistent downstream pressure regardless of fluctuations in the municipal supply. Most homes built after 1980 in Connecticut include a PRV as standard equipment.
Common signs your PRV is failing include water pressure that suddenly drops throughout the home, banging or hammering sounds in pipes (water hammer), leaks from the drain port on the regulator body, or inconsistent pressure between hot and cold water lines. A failing regulator can lead to low flow at fixtures or, if stuck open, allow dangerously high pressure to damage toilets, washing machines, and water heaters. Any suspicion of a PRV problem warrants a call to a licensed plumber who can test the pressure with a gauge and replace the unit if needed. A leak detection and repair specialist can also identify downstream damage from prolonged high pressure.