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In Leesburg, 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 Leesburg are rated 5.0 stars across 1,130 reviews and work under Virginia Class A contractor license 2705192276. Water pressure and PRV replacement in Leesburg: the Town will read your street pressure for you, and we fix whatever the valve inside is doing with it. 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.
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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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Licensed and insuredVirginia Class A contractor #2705192276
24/7 emergency serviceWe answer day or night, and we will tell you honestly when we can get there.
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The price is settled before the workYou see the number in writing before anything is taken apart
What it costs
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 Leesburg
Leesburg runs its own water utility, and its FAQ makes an offer most utilities don’t. Call Utilities at 703-737-7075 when the pressure through the house feels too high or too low, and during business hours staff will check it at the nearest fire hydrant and at your outside hose bib. Those two numbers side by side tell you a lot. If the hose bib reads about what the hydrant does, nothing in your house is holding the street back.
The Town’s FAQ doesn’t say who owns a reducing valve, and we won’t guess for it. What it does say is that the Town’s part ends at the meter and the supply line from the meter box to the house is yours, and a valve on that line, inside your basement or utility closet, sits on your side of it. If you want it in writing, ask Leesburg Utilities. Lansdowne is simpler: it’s on Loudoun Water, whose rules leave the regulator to the customer.
Across town the valve’s age follows the house’s. Four in ten homes inside the limits went up between 1980 and 1999, and a valve set by the builder in those years has usually been replaced once or is overdue. Houses from 2000 on, about a third of town, mostly came with one and an expansion tank beside the heater. Downtown, in the handful of homes from before 1960, there may be no reducing valve at all, just an old main valve where the line comes through the foundation.
Where a house sits matters too. Tuscarora Creek runs right through town, and a house down near it sits lower on the system than one up on a rise, so the same street pressure can feel different two blocks apart. That’s why we read your own hose bib rather than trust a neighbor’s number. In the townhouse rows, nearly three homes in ten, the valve usually sits just past the main shutoff wherever the line enters, often the garage or a closet near the front.
Neighborhood by neighborhood
Census figures for the owner-occupied homes in each place, and what usually sits at the main shutoff in houses like them.
| Place | Median home built | Most homes are | Heated with | What’s usually at the main shutoff |
|---|---|---|---|---|
| Leesburg | 1996 | single-family houses, about 4 in 10 | gas, about 7 in 10 | The builder’s original reducing valve, worn. |
| Lansdowne | 2005 | condo and apartment buildings, about 4 in 10 | gas, about 8 in 10 | A reducing valve and an expansion tank. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
Inside the town limits: the Old and Historic District downtown, Exeter and Carrvale inside the bypass, Potomac Station and Edwards Landing outside it.
Lansdowne only. It’s the one Census place outside the town limits, so the farms and lots beyond it aren’t in these figures.
The signs
Strong flow everywhere plus a toilet that keeps refilling, a dripping relief valve on the heater or pipes that knock when a valve snaps shut usually means too much pressure, not too little. The Town’s hydrant reading and ours at the hose bib tell us whether it’s the valve.
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.
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 Leesburg?
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Choosing who fixes it
Questions to ask anybody who quotes you a valve, us included.
If Leesburg Utilities has been out, you have a hydrant number and a hose bib number. A plumber who uses both, then sets the new valve against a gauge, skips the guessing. In Lansdowne, the reading starts from scratch.
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.
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.
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Questions
On Town water, the Town will: call Utilities at 703-737-7075 and staff check the nearest hydrant and your outside hose bib during business hours. If only one or two taps are weak, the Town’s FAQ points at calcium on the aerator screen first. If the whole house is off, we take it from there, and a valve replaced is $500 to $1,000.
The Town’s FAQ doesn’t publish a number, and it varies with where you sit. Ask Leesburg Utilities, or let them read it at your hose bib. If your house reads high and has no working valve, that’s the case for putting one in.
$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.
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
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 Leesburg 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.