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Common Questions About PRV Valves

What does a PRV valve do in a home? 

A PRV (Pressure Reducing Valve) lowers the water pressure coming from the city before it enters your home. This protects your pipes, fixtures, water heater, and appliances from damage caused by excessive pressure.

How do I know if my home has high water pressure? 

Most homeowners don’t realize their pressure is too high until something fails. Signs include frequent leaking fixtures, running toilets, burst washing machine hoses, or banging pipes. A professional pressure test is the most reliable way to know for sure.

What is safe water pressure for a Phoenix home? 

The ideal residential water pressure is 50–70 PSI. Consider anything above 80 PSI too high and can shorten the life of your plumbing system.

Are PRV valves required in Phoenix or Arizona? 

Yes. Current plumbing codes require a pressure reducing valve if the incoming city water pressure exceeds safe limits. Many older Phoenix homes were built before this requirement and may not have one installed.

Where is a PRV valve located? 

A PRV valve is typically installed on the main water line where it enters the home, often near the shutoff valve or in an exterior valve box. In some homes, it may be inside a garage or mechanical area.

How long does a PRV valve last? 

In the Phoenix area, PRV valves usually last 4–8 years, depending on water quality and usage. Hard water can shorten their lifespan, causing pressure to creep back up over time.

Can a PRV valve fail without leaking? 

Yes. Many PRV valves fail internally and allow pressure to increase without showing any visible leaks. This is one reason routine pressure checks are so important.

Does a PRV valve affect water flow? 

A properly adjusted PRV valve maintains steady, comfortable water flow while keeping pressure at a safe level. If water flow feels weak, the issue is usually unrelated or caused by a failing valve that needs adjustment or replacement.

Will a PRV valve help prevent slab leaks? 

Absolutely. High water pressure is a major contributor to slab leaks in Phoenix homes. A PRV valve reduces constant stress on underground pipes, helping prevent hidden leaks and costly repairs.

How often should water pressure be checked?

Check your water pressure once a year, or anytime you notice changes in pressure or repeated plumbing issues. It’s a simple test that can prevent expensive damage.

Can I adjust or replace a PRV valve myself? 

PRV valves require proper sizing, adjustment, and testing. Incorrect installation can cause pressure problems or code violations. It’s best to have a licensed plumber inspect or replace the valve to ensure your home is protected.

Services in Phoenix & Beyond

When you’ve found yourself in need of plumbing services in the Phoenix, Glendale, Scottsdale, or Chandler area, you can trust Robins Plumbing to provide you with prompt and expert care, contact our team today! In addition to our toilet services, we also offer a variety of residential and commercial plumbing services, including: drain cleaning, water heater repair and replacement, sewer camera inspection and locating, backflow prevention, commercial and residential jetting, water treatments, trenchless sewer repair and more. Visit our reviews online to see what others have to say about our local plumbing company!