Pressure Regulator & Main Shutoff Valve Replacement in San Diego
High water pressure is one of the leading causes of pipe damage, fixture wear, and water heater failure in San Diego homes. We repair and replace pressure reducing valves (PRVs) and main shutoff valves to protect your plumbing system.
Free estimates · Licensed, bonded & insured · CA License #1056863
Licensed, Bonded & Insured
CA License #1056863
Same-Day Service
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Available 24/7
No overtime charges
Free Estimates
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San Diego's municipal water supply often comes in at 80–150 PSI — well above the 50–70 PSI that residential plumbing is designed to handle. A pressure reducing valve (PRV) sits at the point where the main water line enters your home and steps that pressure down to a safe level. When the PRV fails or wears out, your pipes, fixtures, water heater, and appliances are exposed to that high street pressure every time water runs.
The damage from unregulated high pressure is gradual but cumulative. Pipes develop pinhole leaks. Fixture washers and cartridges wear out faster than they should. The pressure relief valve on your water heater starts discharging. Appliance hoses and connections fail prematurely. Replacing a failing PRV is one of the most cost-effective things you can do to protect your plumbing system.
We also replace main shutoff valves — the valve that controls all water entering your home. Older gate valves and ball valves can seize or corrode over time, leaving you without a reliable way to shut off the water in an emergency. We recommend replacing a failing shutoff valve before you need it, not during a burst pipe.
What We Do
- Pressure reducing valve (PRV) testing, repair, and replacement
- Main shutoff valve replacement — ball valve upgrade from older gate valves
- Water pressure testing with a gauge to confirm current pressure
- Expansion tank installation for closed plumbing systems
- Whole-house pressure assessment to identify downstream damage
- Angle stop and fixture shutoff valve replacement
- Emergency shutoff valve repair when the main won't close
Signs You Need This Service
- Water hammering or banging pipes when fixtures are turned off
- Fixtures that spray aggressively or feel unusually forceful
- Pressure relief valve on the water heater discharging
- Pinhole leaks developing in copper supply lines
- Appliance hoses or connections failing prematurely
- Fluctuating water pressure throughout the day
- Main shutoff valve that is stiff, leaking, or won't fully close
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Free estimates · No overtime charges · Licensed, bonded & insured
Why Choose A Pro Plumbing
Frequently Asked Questions
What does a pressure regulator do?
A pressure reducing valve (PRV) reduces the water pressure coming from the city main — which can be 80–150 PSI — down to a safe level for your home's plumbing, typically 50–70 PSI. Without a functioning PRV, high pressure stresses pipes, fittings, water heaters, and appliances, leading to leaks, premature fixture failure, and wasted water.
How do I know if my pressure regulator is failing?
Signs of a failing PRV include unusually high water pressure (water hammering, banging pipes, or fixtures that spray aggressively), fluctuating pressure throughout the day, the pressure relief valve on your water heater discharging, and pinhole leaks developing in copper pipes. A plumber can test your pressure with a gauge in minutes.
What is a main shutoff valve and why would it need to be replaced?
The main shutoff valve controls all water entering your home. Over time, older ball valves and gate valves can seize, corrode, or fail to close completely — meaning you can't shut off the water in an emergency. Replacing a failing shutoff valve before it's needed is far less stressful than discovering it won't close during a burst pipe.
Do you replace pressure regulators in Chula Vista and the SDSU area?
Yes — we serve all of San Diego County. High street pressure is common in many San Diego neighborhoods, making a properly functioning PRV important for protecting your plumbing system.
Other Services We Provide
Kitchen, bathroom, floor drains, and mainline stoppages cleared same day.
Tank and tankless water heater repair, replacement, and maintenance.
Underground sewer pipe repairs, drainline replacements, excavation, and main sewer line repairs.
High-pressure pipe cleaning for grease, scale, and recurring clogs.
Slab leaks, wall leaks, burst pipes, and hidden leak detection.
Burst pipes, flooding, sewer backup — we respond around the clock.
Serving San Diego County — Including These Areas
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Free estimates. No overtime charges. Available 24/7 across San Diego County.