What is pressure reducing valve?
A pressure reducing valve, or water pressure regulator, is a bell-shaped valve after the main shut-off that lowers incoming water pressure.
Plumbing codes require a pressure reducing valve when street pressure is above 80 PSI, and most homes run best at 50 to 70 PSI.
What are the 5 signs of a failing pressure reducing valve?
The 5 signs of a failing pressure reducing valve are listed below, from the most common to the least common.
- Pipes bang when a valve closes.
- Water pressure jumps above 80 PSI on a gauge.
- Faucets and toilets drip from high pressure.
- Water pressure drops low at every fixture.
- The water heater relief valve drips.
Seeing one of these signs? Call a local plumber now.
Call (607) 305-8020How does a plumber replace a pressure reducing valve?
A plumber uses the 4 steps below to replace a pressure reducing valve.
- Tests the house pressure with a gauge on a hose bib.
- Shuts off the main and removes the old valve.
- Installs the new valve with unions.
- Sets the pressure to 50 to 70 PSI and tests again.
How much does pressure reducing valve replacement cost in Lancaster, PA?
Pressure reducing valve replacement in Lancaster, PA costs $250–$350, according to HomeAdvisor. A main shut-off valve replacement costs $375–$600 or more.
Typical prices for 2 pressure reducing valve jobs are shown in the table below.
| Job | Typical price |
|---|---|
| Water pressure regulator replacement | $250–$350 |
| Main shut-off valve replacement | $375–$600+ |
Source: HomeAdvisor national cost data, 2025–2026. Ranges are what most homeowners pay; your plumber gives the price for your job before work starts.
Want a price for your job? Call and describe the problem to a local plumber.
Call (607) 305-8020Related plumbing problems and next steps
When is a pressure reducing valve replacement problem an emergency?
A pressure reducing valve replacement problem is an emergency when the relief valve on the water heater drips constantly. Call a plumber to test the pressure. Emergency calls for water line problems go to an emergency plumber across Lancaster County.
What services are related to pressure reducing valve?
The 4 services related to pressure reducing valve are listed below.
- Water line repair is the parent service, and the water line repair in Lancaster page covers it in full.
- Low water pressure plumber signs, steps and prices are on the low water pressure plumber in Lancaster page.
- Backflow testing signs, steps and prices are on the backflow testing in Lancaster page.
- Pipes banging in walls has 4 causes, listed in the pipes banging in walls guide.
Frequently asked questions
What water pressure is too high for a house?
Water pressure above 80 PSI is too high for a house, and plumbing codes require a pressure reducing valve at that level.