Pressure-Reducing Valve (PRV) Replacement in Seattle-Tacoma
Water pressure too high, banging pipes or a dripping relief valve? Licensed plumbers test your pressure and repair or replace the valve.
Locally-owned since 1977 • Licensed, bonded and insured in Washington (WA Contractor Reg. #HOMECCA785BD) • WA Plumbing Contractor Lic. #HOMECCA751QG (residential) • BBB Accredited Business since 2002
PRV replacement for Puget Sound homes
A pressure-reducing valve (PRV) sits where your water line enters the house. It lowers street pressure to a level your pipes, fixtures and water heater can handle. A home needs one when the water pressure is over 80 psi. When a PRV wears out, pressure climbs and leaks start. Our licensed plumbers test your pressure, then repair or replace the valve. The plumbing dispatch fee is $99, and your plumber quotes the work on site before starting.
| What it is | A valve on your incoming water line that lowers the pressure, also called a water pressure regulator |
| Required when | Static water pressure is over 80 psi |
| Typical life | 10 to 15 years, according to the City of Kirkland |
| Our price | $99 dispatch fee; the plumber quotes the work on site before starting |
WA Plumbing Contractor Lic. #HOMECCA751QG (residential). Call (425) 645-0404 or book online.
Signs your pressure-reducing valve is failing
- Pipes that bang or hum when a tap closes
- Faucets and toilets that drip or run
- Burst washing machine or toilet supply hoses
- A dripping relief valve on the water heater
- Pressure that swings, or drops to a trickle
- A gauge reading over 80 psi
Test your pressure in 2 minutes
- Screw a pressure gauge onto an outdoor faucet or the washing machine connection.
- Make sure no water is running inside the house.
- Open the faucet and read the gauge.
Do not turn the PRV adjusting screw to fix a high reading. Call a plumber. Full guide: how to spot a failing PRV in Seattle.
What should your home water pressure be?
| Gauge reading | What it means |
|---|---|
| Under 40 psi | Low. Check the PRV, the main shut-off and old pipes |
| 40 to 60 psi | A common target range for homes |
| 60 to 80 psi | Higher, but within the code limit |
| Over 80 psi | Too high. Code calls for a PRV |
Bremerton Water says most plumbing professionals recommend a PRV setting between 35 and 60 psi, and that city pressure can range from about 30 psi to over 100 psi depending on elevation. City of Bellevue Utilities standards list 80 psi as the maximum service pressure.
Is a PRV required in Washington?
Yes, when static water pressure is over 80 psi. Washington adopts the Uniform Plumbing Code through WAC 51-56, and local utilities such as the City of Bellevue require an individual PRV on homes where pressure exceeds 80 psi.
The valve is on your side of the water meter, so it is yours to maintain. Kirkland and Bremerton both say homeowners install, maintain, repair and replace their own PRVs.
Repair or replace: what your plumber will check
When a valve needs replacing
A valve that cannot hold a setting, leaks from the body, or is corroded or seized usually needs replacing. So does a valve near or past 10 to 15 years old when pressure keeps creeping up.
Thermal expansion and expansion tanks
A PRV can stop water from flowing back to the street. When your water heater heats water, the water expands and the pressure rises. With nowhere to go, it can make the water heater relief valve drip. An expansion tank gives that water room. Your plumber checks whether you need one on your water heater. Never cap or plug a dripping relief valve.
Where is my PRV?
Usually near the main shut-off where the water line enters the house, in a basement, crawl space or garage, or in a box near the meter.
How much does PRV replacement cost?
Our plumbing dispatch fee is $99. Your plumber tests the pressure, finds the cause and gives you a price before any work starts.
What changes the price: how easy the valve is to reach, the pipe material, the valve size, whether a shut-off valve or union is added, whether an expansion tank is needed, and any permit fee.
Ways to save
Right now you get $50 off same-day recommended plumbing work. See plumbing offers. Payment plans are available through Salal Credit Union and Synchrony, starting at $179/month*. See financing. A Home Comfort Club plumbing plan includes a whole-home plumbing inspection that checks your incoming water pressure. See Comfort Club plans.
*Subject to credit approval.
Our PRV replacement process
- Book by phone or online, 24/7. Our plumbers work Monday to Friday, 8 AM to 5 PM, with same-day service when possible.
- We test the pressure at an outdoor faucet or the washing machine connection.
- We check the PRV, the main shut-off, the water heater relief valve and any expansion tank.
- You get a written quote on site.
- We shut off the water, replace the valve and set the pressure.
- We test again and show you the reading.
Permits for PRV work
In Seattle and unincorporated King County, Public Health Seattle and King County issues plumbing permits, and it added pressure-reducing valves to its plumbing permit items in 2025. Other cities issue their own permits.
A recent PRV replacement in Everett
In September 2026 an Everett homeowner asked us to replace their pressure-reducing valve. Our plumber installed a new 1-inch valve on the main line in the crawl space and set the house pressure to 70 psi, the setting the homeowner asked for. Because the home has an expansion tank on the water heater, the plumber also reset the tank's air charge to 52 psi to match the new house pressure. Everything was tested with no leaks.
Resetting the expansion tank is an easy step to miss. If its air charge does not match the house pressure, the relief valve on the water heater can start to drip.
PRV replacement FAQ
What does a pressure-reducing valve do?
A pressure-reducing valve lowers the water pressure coming from the street to a safer level for your home. It sits near where the water line enters the house. Without it, high pressure wears out faucets, toilet parts, supply hoses and your water heater faster.
What water pressure is normal for a house?
Bremerton Water says most plumbing professionals recommend a PRV setting between 35 and 60 psi. City of Bellevue standards set 80 psi as the maximum service pressure. If your gauge reads over 80 psi with no water running, your PRV is missing, set wrong or failing.
Is a PRV required in Washington?
A PRV is required when static water pressure is over 80 psi. Washington adopts the Uniform Plumbing Code, and local utilities such as the City of Bellevue require an individual PRV on homes where pressure exceeds 80 psi.
Who is responsible for my PRV?
You are. The valve is on your side of the water meter. Utilities such as Bremerton and Kirkland say homeowners install, maintain, repair and replace their own PRVs.
How long does a pressure-reducing valve last?
The City of Kirkland says PRVs commonly last 10 to 15 years. Hard use, debris in the water and high street pressure can shorten that. If your valve is that old and pressure is creeping up, have it checked.
How much does it cost to replace a PRV?
Our plumbing dispatch fee is $99. Your plumber tests the pressure and quotes the repair or replacement on site before any work starts.
Why does my water heater relief valve drip after a new PRV?
A PRV can stop water from flowing back to the street. When your water heater heats water, the water expands and pressure rises. An expansion tank gives that water somewhere to go. Never cap or plug a dripping relief valve. Call a plumber.
Do I need an expansion tank with a PRV?
Often, yes. When a PRV or other device closes your water system, an expansion tank on the water heater handles the extra pressure from heated water. Your plumber checks for one during a PRV visit.
Can I adjust my PRV myself?
Most PRVs have an adjusting screw, but Kirkland warns that wrong adjustment can cause plumbing problems or code violations. A failing valve often will not hold a new setting anyway. Test your pressure, then call a licensed plumber.
Do I need a permit to replace a PRV in Seattle?
In Seattle and unincorporated King County, plumbing permits come from Public Health Seattle and King County, which added pressure-reducing valves to its permit items in 2025. Other cities issue their own permits.
How soon can a plumber come out?
You can book 24/7 by phone or online. Our plumbers work Monday to Friday, 8 AM to 5 PM, with same-day service when possible.
Why Choose Home Comfort Alliance for PRV Replacement?
Your Comfort is Our Promise
Reliable heating, air conditioning, plumbing and electrical service, all from one trusted company.
To educate and guide you through your options so you’ll find the right solution at the right price.
Knowledgeable and respectful workers who ensure both your own comfort during every visit, and lasting comfort from your home systems.
Outstanding service, communication, and follow-up, so your home is comfortable now and for years to come.
Get your water pressure fixed
Tell us what you are noticing, and our team will set up a plumbing visit with an upfront price.
Get an estimate
We will call you to set up the visit.