A relief valve that drips in a house this young
Eight years in, that’s rarely a worn valve. It’s usually the setting or the expansion tank next to it, and it’s the cheapest moment to find out.
Aldie, Virginia
Water pressure and pressure reducing valve replacement in Aldie.
In Aldie, 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 Aldie are rated 5.0 stars across 1,130 reviews and work under Virginia Class A contractor license 2705192276. Water pressure and PRV replacement in Aldie and Stone Ridge, where the houses are new enough that the valve’s setting matters more than its age. 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
- Our own licensed plumbers
- Set and tested before we leave
5.0 stars across 1,130 reviews
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 Aldie.
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 Aldie
Aldie’s reducing valves are young, so the first suspect is the setting, not wear.
Ninety-three in a hundred Aldie owner homes went up in 2000 or later, and the typical one dates to 2013. The reducing valve in a house like that is a dozen years old or less, short of when valves usually wear out. So a banging pipe or a dripping relief valve here points first to how the valve was set and what sits beside it, and only then to a worn part. A new part on a bad setting just repeats the problem.
Loudoun Water’s rules put the pressure regulator on the customer. In a new subdivision, that means the builder’s plumber adjusted it once, before closing, and nobody has looked at it since. Valves can also drift in their first years, and building grit that got into the line can keep a seat from closing. Both are trade experience, and both show up in a two-minute reading.
Stone Ridge is about a third townhouses, plus condo communities with their own management companies. In a townhouse the valve is inside your unit by the main shutoff. In a condo building there may be one valve for the whole building. Ask management before you pay for a second one.
The old village along Route 50 is a different case. Aldie is the one village in Loudoun served by a private water company, not Loudoun Water, so the pressure on those streets, and the rules about who looks after what, are that company’s. Check the name at the top of your bill before assuming Loudoun Water’s rule applies. Older houses there are also where a weak shower is more likely the pipe than the valve.
By the numbers
Aldie houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
Aldie
ZIP 20105 as a whole: every Aldie address, inside Stone Ridge and out.
- Median home built2013 Census
- Built before 1980hardly any Census
- Built since 2000about 9 in 10 Census
- Most homes aresingle-family houses, about 6 in 10 Census
- Heated withgas, about 8 in 10 Census
- Rentedabout 1 in 10 Census
- Houses built since 2000 usually have a valve and an expansion tank already, so the job is more often a worn valve than a missing one.
- Most homes here are detached houses, each with its own meter and its own valve, usually in the basement or crawlspace where the line comes in.
The signs
When a Aldie house has a pressure problem.
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.
The pressure dropped and stayed low
When every faucet in the house went weak at once, the valve at the main is the first suspect. They wear out and can fail closed, and a stuck valve feels exactly like the water company turned you down.
Need water pressure and pressure reducing valves in Aldie?
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Choosing who fixes it
How to pick who fixes water pressure in Aldie.
Questions to ask anybody who quotes you a valve, us included.
Will they check the setting before swapping the part?
On a house from the 2010s the part is probably fine. A plumber who reads the pressure and looks at the tank first may save you the replacement, and will tell you so.
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.
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- Class AVirginia contractor, license #2705192276Look it up with DPOR
Where we work
Water pressure and pressure reducing valves in every Northern Virginia town we serve
Next door to Aldie: Ashburn, Chantilly, Sterling, Leesburg and Centreville.
Fairfax County
Arlington County
Loudoun County
Prince William County
Fauquier County
Stafford County
Every town on one page
Questions
Water pressure questions from Aldie.
My Stone Ridge townhouse is under ten years old. Can the valve already be bad?
It can, though it’s more likely to have drifted or clogged than to have worn out. A gauge on the hose bib settles it in a couple of minutes, and if the reading is fine you’ve spent nothing.
Who handles water pressure in old Aldie village?
Look at your bill first. The village has a private water company, and the name there tells you who looks after the street. The valve on your side of the meter is usually the owner’s, but confirm that with them.
How much is a pressure reducing valve replacement in Aldie?
$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 Aldie 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.