If you’ve never heard of a pressure reducing valve (PRV), you’re not alone — but this small device may be one of the most important components in your entire plumbing system. A properly functioning PRV protects every pipe, fixture, and appliance in your home from excessive water pressure. Davis Plumbing and Heating Inc. installs, adjusts, and replaces PRVs throughout Riverside County.

What Is a Pressure Reducing Valve?

Municipal water supply lines often deliver water at 80-150 PSI — far more pressure than residential plumbing is designed to handle. A PRV (also called a pressure regulator) is installed where the water service enters your home. It reduces incoming pressure to a safe operating range, typically 45-65 PSI.

Why Proper Water Pressure Matters

Normal residential plumbing systems are designed for 40-80 PSI operation:

  • Below 40 PSI: Weak flow from faucets and showers; appliances don’t function properly
  • 40-80 PSI: Normal residential operation
  • Above 80 PSI: Stress on pipe joints, accelerated fixture wear, water hammer, premature water heater failure, and washer/dishwasher hose blowouts
  • Above 100 PSI: Significant risk of pipe joint failure and appliance damage

Signs Your PRV Is Failing

  • Water pressure that seems too high — Faucets that splash, showers that sting, toilets that fill loudly
  • Water pressure that’s suddenly too low — A failing PRV can stick closed and severely restrict flow
  • Banging or hammering pipes — Water hammer is often caused by excessively high pressure
  • PRV visibly leaking — A small brass fitting near the main shutoff that’s dripping or weeping means the PRV seal has failed
  • The PRV is 10+ years old — PRV lifespan is typically 10-15 years

How to Check Your Water Pressure

Buy a water pressure gauge at any hardware store ($10-20). Attach it to an outdoor hose bib and open the valve. The reading should be 45-80 PSI. Above 80 PSI, have your PRV inspected or replaced. Below 40 PSI, have the PRV or your pressure-side plumbing inspected.

PRV Replacement in Riverside County

A PRV replacement is a permit-required job in most Riverside County jurisdictions. Davis Plumbing handles the permit, supplies a quality PRV, and adjusts the outlet pressure to the optimal setting for your home’s plumbing. Call (951) 657-0393 for PRV inspection or replacement. Or schedule online.