Plumber in Herndon, VA
Father and son, 45 years between us, backflow certified. We pick up the phone, we show up in Herndon, and we tell you straight what the pipe needs.
Call us540-671-5417Herndon, VA Fairfax County Town limits inside the county
Herndon is its own town inside Fairfax County, and the plumbing here is older than most people think.
We are Ajax Plumbing LLC, a family shop run by a father and a son out of 266 Grove Farm Rd in Front Royal. Herndon is a run east on Route 7 or up I-66 and over, roughly 55 to 60 miles depending on which way the traffic in Fairfax County sends us. We make that drive because Herndon homeowners call back, and because the housing here gives us real work, not just swap-the-flapper jobs.
The first thing to know about Herndon is that the town center is genuinely old. The original grid around Elden Street and Station Street dates back to the railroad days, and the houses around there carry galvanized supply lines, cast iron drain stacks, and the occasional length of original lead going to the meter. Galvanized pipe rusts shut from the inside, so the symptom we hear most from the older Herndon blocks is the same one every time: water pressure that fell off a cliff over the last few years and never came back. That is not your well, that is not the town main, that is forty year old steel choking itself. The fix is a repipe, and we do it in copper or PEX depending on what is behind your walls.
Ring out from the historic core and Herndon turns into the late-twentieth-century subdivisions, the Kingstream, Folly Lick, and Franklin Farm side of things, plus everything that filled in along Herndon Parkway and Dranesville Road. Those homes are on copper that has reached the age where pinhole leaks start, and on the first generation of polybutylene that some builders ran in the late 70s and early 80s. If your house has gray plastic supply line with crimped fittings, get it looked at before it lets go, because polybutylene fails without warning. We do leak detection on the whole range, find the wet spot without tearing your drywall apart guessing, and repipe what needs repiping.
Water heater service in HerndonThe work What Herndon calls us for
One truck, one family, every job in town from a dripping fixture to a full sewer line.
Herndon is on Fairfax Water municipal supply for the most part, so the water heater story here is hard-water scale and age, not the iron-and-sulfur fight you get out on a well. A tank in a Herndon townhouse that is twelve or fourteen years old is living on borrowed time, and when it goes it usually goes onto a finished basement floor. We replace tank heaters and we install tankless, and we are certified on most of the brands you will already have, so you are not paying us to learn your unit on your dime.
The other steady call out of Herndon is drains. Mature trees line a lot of these streets, and tree roots love the joints in old clay and cast sewer laterals. We run a camera down the line so you actually see the problem instead of taking our word for it, and we cut roots and grease with hydro jetting rather than just snaking it and waiting for it to back up again next season. When a lateral is collapsed or offset under the yard, we repair the sewer line and show you the footage of why.
Water HeatersTank and tankless, replacements and repairs, certified on most major brands. We size it for your Herndon household instead of selling you the biggest one on the shelf.
See water heaters
Drains & JettingCamera inspection first, then hydro jetting to clear roots, scale and grease from the line for real, not just a temporary push-through.
See drain clearing
Sewer LinesCamera diagnosis, root cutting, and repair on the clay and cast laterals common under older Herndon yards.
See sewer inspections
Leak Detection & RepipingWe find the leak before we open the wall. Repipe out galvanized and polybutylene in copper or PEX.
See residential
Gas Lines & FixturesGas line work, fixture installs and swaps, faucets, toilets, and the small jobs that keep a house running.
See residential
Remodels & CommercialRough-in and finish plumbing for Herndon remodels, plus residential and commercial service across town.
See remodeling
Commercial plumbing service in HerndonAround town Fairfax County coverage
Herndon, and the whole northwest corner of Fairfax County around it.
Herndon sits up against the Loudoun County line, with the Dulles Toll Road and the Silver Line running right past the south edge of town. That puts us a short hop from Reston next door and Vienna a few miles down, and it means we cover the dense, built-up northwest of Fairfax County as one service area. If your street straddles the Herndon and Reston line, or you are technically Herndon mailing address but actually unincorporated county, it makes no difference to us. We come to the pipe.
This is part of our broader Fairfax County plumbing coverage. We work the towns around Herndon every week, so if you are reading this for a neighbor or a rental on the next street over, here is where else we run.
Fairfax/Reston/Vienna/Burke/Annandale/McLean
We run from our shop at 266 Grove Farm Road in Front Royal out to Herndon and the towns around it. Here is where you will find us on the map.
Why us The straight version
Free quotes, blunt answers, and the same two faces every visit.
We are not a franchise with a call center routing your job to whoever is nearest. You get a father and a son who have spent 45 combined years under sinks and in crawlspaces, and who would rather lose a quote than oversell you a repipe you do not need yet. Quotes are free, so a second opinion on Herndon work costs you nothing but a phone call.
For emergencies we run 24/7, because a burst line at two in the morning in February does not wait for business hours. Northern Virginia winters freeze water lines, especially in older Herndon homes with exposed runs in unheated crawlspaces and along uninsulated rim joists. If a frozen line splits on you, we run 10% off frozen water-line repairs, and we will tell you which exposed sections to insulate so it does not happen again next cold snap.
We are backflow certified, which matters in town for irrigation systems and any commercial property that needs annual testing to stay compliant with Fairfax Water. If you have a backflow device that is due, or a sprinkler system that tripped a test, we handle that too. Want to see the kind of work we turn out before you call? Take a look at our project gallery.
Herndon Plumbing Questions
How fast can you get to Herndon from Front Royal?
We are based at 266 Grove Farm Rd in Front Royal, roughly 55 to 60 miles from Herndon depending on the route and Fairfax County traffic. For scheduled work we set a real window so you are not waiting all day. For 24/7 emergencies we move as fast as the roads allow and tell you honestly how long it will take to reach your door.
My water pressure has dropped all over the house. What causes that in Herndon?
In older Herndon homes near the historic town center it is almost always galvanized supply pipe rusting shut from the inside, which strangles flow over years. It can also be a failing pressure regulator or a hidden leak. We diagnose which it is before we quote anything, and if it is the galvanized, a repipe in copper or PEX restores full pressure for good.
Do you replace tankless water heaters as well as tank units?
Yes. We install and repair both. Herndon runs on Fairfax Water municipal supply, so hard-water scale is the main enemy of a heater here. We are certified on most major brands, we size the unit to your household, and we will give you the honest cost difference between staying with a tank and going tankless.
There are big trees on my street and my drains are slow. Is that connected?
Very often, yes. Mature trees along Herndon streets send roots into the joints of older clay and cast iron sewer laterals. We camera the line so you see the roots yourself, then clear them with hydro jetting instead of a quick snake that backs up again next season. If the lateral is cracked or collapsed, we show you the footage and repair the sewer line.
My Herndon house has gray plastic supply lines. Should I worry?
If those are polybutylene, the gray plastic with crimped fittings common in late 70s and early 80s builds, yes, get it looked at. Polybutylene fails without warning and is hard to insure. We inspect it, do leak detection on the rest of the system, and repipe in copper or PEX before it lets go and floods a wall.
Do you handle backflow testing and commercial work in Herndon?
We do. We are backflow certified, so we test and service backflow devices on irrigation systems and commercial properties that need to stay compliant with Fairfax Water. We work both residential and commercial across Herndon and the surrounding northwest corner of Fairfax County.
Need a plumber in Herndon, VA?
Tell us what is going on and a real person calls you back, usually within the hour. The quote is always free.
Rather talk now? Call 540-671-5417, 24/7.