The washing machine’s fill valve fails twice
In a townhouse from 1990, a washer that eats its inlet valves every few years can be pressure doing it. A reading tells you whether to blame the machine or the house.
Centreville, Virginia
Water pressure and pressure reducing valve replacement in Centreville.
In Centreville, a pressure reducing valve replaced is $500 to $1,000. Call SwiftPro, rated 5.0 stars across 1,130 reviews, at (703) 997-9757, 24 hours a day, 7 days a week.
SwiftPro’s plumbers in Centreville are rated 5.0 stars across 1,130 reviews and work under Virginia Class A contractor license 2705192276. Water pressure and PRV replacement in Centreville, where half the homes are townhouses with builder valves thirty years old and more, on Fairfax Water. If the pressure is fine and the trouble is a hidden leak, finding it is $200 to $500. A main shutoff valve is priced at your house, once we’ve seen the pipe it’s on.
- A gauge reading before the price
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- Set and tested before we leave
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New copper supply piping with red-handled shutoff valves, installed and tagged by one of our plumbers.
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What it costs
What a pressure reducing valve costs in Centreville.
From the same price book as our plumbing price list: the valve, the fittings, setting it with a gauge and checking the house afterward. More on what causes it in our low water pressure guide.
Pressure reducing valve replacement
$500 to $1,000
Leak detection
$200 to $500
Prices checked .
Where you land in the range is mostly where the valve sits and what it’s attached to: a valve right at the main shutoff in an open basement is the easy end, one behind a finished wall or on corroded pipe is the other.
When a new valve brings the pressure down, the water heater can no longer push its expansion back into the street, so we check for an expansion tank on the same visit and tell you if the house needs one.
What’s different in Centreville
Centreville’s builder valves are past thirty, and more than a quarter of households rent.
Nearly seven in ten Centreville homes went up between 1980 and 1999, and close to half are townhouses. A reducing valve put in at the build is now somewhere between thirty and forty-five years old, past the age most plumbers expect them to last. These rows were built in batches, so the valves in a single street tend to age together, and one neighbor’s trouble is a fair hint about the rest.
Fairfax Water promises 20 psi at its main and no uniform pressure beyond that, and the reducing valve on your side of the meter is yours to buy and keep up. That includes a rental. With about 27 percent of Centreville households renting, a tenant who sees a dripping relief valve or hears pipes knocking usually has a landlord who owns the valve, and the useful thing to send them is a number from a gauge.
Fairfax Water calls its water moderately hard to hard. In a reducing valve, minerals and grit can build up on the seat so it stops closing properly, and then pressure creeps up between uses. A house like that may read fine at breakfast and run high after a quiet night. That’s trade experience, and it’s the reason to read the pressure more than once.
Where the valve sits depends on the house. In a townhouse it’s inside your unit, by the main in a utility closet or the basement. Condos and apartment buildings are about one home in seven, and a single building valve often protects every unit, which makes it the association’s decision. Detached houses, about three in ten, are the ones with an open basement wall and the easy install.
By the numbers
Centreville houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
Centreville
- Median home built1990 Census
- Built before 1980about 1 in 10 Census
- Built since 2000about 2 in 10 Census
- Most homes aretownhouses, about 5 in 10 Census
- Heated withgas, about 7 in 10 Census
- Rentedabout 3 in 10 Census
- Houses from the 80s and 90s often came with a valve after the main shutoff, and many of those are original and worn.
- Many homes here are townhouses or condos. A townhouse usually has its own valve near the meter; in a condo building it may be the building’s, so the association is the first call.
The signs
When a Centreville house has a pressure problem.
The house is old enough that the valve is too
Many houses built on public water since the 1980s came with a valve right after the main shutoff. A lot of those are the originals, and a valve that old has usually stopped holding the pressure where it was set.
Pipes bang when a faucet shuts
A thud in the wall when the washer or a faucet closes is water hammer, and high pressure makes it worse. So does a toilet that keeps refilling, or faucets that drip no matter how many washers go in.
Need water pressure and pressure reducing valves in Centreville?
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Choosing who fixes it
How to pick who fixes water pressure in Centreville.
Questions to ask anybody who quotes you a valve, us included.
Can they work with your landlord or association?
In a rental or condo, whoever owns the valve decides. A plumber who writes up the reading and what they found on a page you can forward saves a week of back and forth.
Did they put a gauge on it before the price?
A valve quoted without a pressure reading is a guess. Ask what the house reads now, static and with water running, and what they’ll set it to.
Did they ask about the water heater?
A new valve changes how the water heater handles expansion. The plumber who checks for an expansion tank is the one who saves you a dripping relief valve next month.
Two of our crew going over a work order before the day's calls.
From our Google reviews
What our customers say.
5.0 stars across 1,130 reviews. Read them on our reviews page.
Polite, courteous, professional, and without any hard sell pressures.
- 5.0stars across 1,130 reviewsHow we count them
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- 2026Voted a Nextdoor Neighborhood Faves winner two years running: 2026 in 30 Northern Virginia neighborhoods, 2025 in Emerald Chase (Herndon) and Hunters Run (Chantilly)See it on Nextdoor
- #1BusinessRate Best of 2026: the top-ranked heating contractor in Fairfax, VirginiaSee our BusinessRate score
- Class AVirginia contractor, license #2705192276Look it up with DPOR
Questions
Water pressure questions from Centreville.
I rent a townhouse in Centreville and the relief valve drips. Who pays?
The valve on the house side of the meter belongs to the property owner, so tell your landlord and send along the reading. Don’t plug or cap the relief valve. It’s the safety on the water heater.
Is the pressure valve in my Centreville condo mine?
If one valve feeds the whole building, it’s the association’s. If your unit has its own near its main shutoff, it’s yours. Your declaration or management settles it, and we’ll tell you which we find.
How much is a pressure reducing valve replacement in Centreville?
$500 to $1,000, with the valve, the fittings and setting it with a gauge in that number. Where you land depends on where the valve sits and the pipe it’s on.
What should my water pressure be?
Most houses run well somewhere around 50 to 70 psi. The Virginia Residential Code calls for a reducing valve once the street pressure tops 80 psi. We read it with a gauge on a hose bib so you know your own number.
Ready when you are
Find out what the pressure really is.
Call, or send the form at the top. We put a gauge on the house, show you the number, and you get the price in writing before any valve comes out.
SwiftPro Heating, Cooling & Plumbing
4230 Lafayette Center Dr N, Chantilly, VA 20151
44679 Endicott Dr, Suite 211, Ashburn, VA 20147
SwiftPro Plumber & Water Heaters
4200 Lafayette Center Dr, Suite N, Chantilly, VA 20151
Virginia Class A contractor license #2705192276
SwiftPro Heating, Cooling & Plumbing is a licensed, BBB Accredited (A rating), independently owned heating, cooling and plumbing company in Chantilly, serving Centreville and the rest of Northern Virginia. Virginia contractor license #2705192276. 5.0 stars across 1,130 reviews on Google, Angi, Yelp, the BBB and Facebook. SwiftPro maintains a dedicated HVAC team and a dedicated plumbing team.
From SwiftPro Heating, Cooling & Plumbing in Chantilly. Housing figures are the Census Bureau’s American Community Survey, 2020 to 2024, for each place named; permit, water and sewer facts link to each office’s own page and were checked in September and October 2026.