How to Adjust a Water Pressure Regulator in Your Rancho Santa Margarita Home, and When Adjusting Is Not Enough
The bell-shaped valve near your main line controls the pressure in every pipe in the house. How to check and adjust it safely in Dove Canyon, Robinson Ranch and…
Water arrives at many Rancho Santa Margarita homes at a higher pressure than household plumbing should see. A pressure regulator, also called a pressure reducing valve or PRV, brings it down to a safe level. Most regulators can be adjusted, and knowing how helps you fix weak or harsh pressure before it damages pipes and fixtures.
Where to find it
The regulator is usually on the main line where it enters the house, often near the front hose bib or in the garage close to the main shutoff. It is typically a bell-shaped brass valve with an adjusting screw and lock nut on top.
Check pressure first
Before touching the regulator, measure the pressure. Screw a pressure gauge onto an outside hose bib, make sure no water is running in the house, and open the bib. Most homes do well around 50 to 60 psi. California plumbing code generally calls for a regulator when pressure is over 80 psi.
How to adjust it
- Loosen the lock nut on top of the regulator.
- Turn the adjusting screw clockwise to raise pressure or counterclockwise to lower it, a small amount at a time.
- Open a faucet briefly to let pressure settle, then read the gauge again.
- When you reach the target, tighten the lock nut.
If the screw will not turn, or turning it changes nothing, stop. Forcing a corroded regulator can damage it.
When adjusting is not enough
- Pressure creeps up overnight even after you set it
- The gauge reads close to street pressure no matter where you set the screw
- The regulator hums, chatters or leaks from the body
- Pressure drops sharply when two fixtures run
These usually mean the regulator is worn out and needs replacing. A failed regulator lets high pressure into the whole house, which stresses old copper, water heater relief valves and supply lines.
Rancho Santa Margarita homes and pressure
Rancho Santa Margarita was built mostly in the late 1980s and 1990s on hillsides and canyons, including Dove Canyon, Robinson Ranch and the villages around the lake and town center. Pressure can be high on lower streets, and many original regulators are now 30 or more years old. Water is supplied by Santa Margarita Water District.
Regulators and repiping
When we repipe a home with PEX-A, we check incoming pressure and the regulator, and replace a worn regulator so the new lines see steady pressure. Work is permitted and inspected through the City of Rancho Santa Margarita.
Related reading
See why pipe straps and hangers matter for quiet pipes, or read about repiping a two-story house. Neighbors can visit Mission Viejo, Coto de Caza and Trabuco Canyon, or see every city we serve at repipeinc.com.
Pressure still not right?
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Repipe OC, 23821 Hillhurst Drive, Laguna Niguel, CA 92677, (949) 524-2362, CSLB #1087885 C-36.
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Written by Repipe OC · CSLB #1087885 C-36 · 23821 Hillhurst Drive, Laguna Niguel, CA 92677 · (949) 524-2362