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Water heater flushes and tankless descaling in Warrenton, on Town water, FCWSA water or your own well. $99 for a tank flush right now.
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5.0 stars across 1,132 reviews
Two of our technicians in a customer’s basement, next to the furnace and a tank water heater.
Licensed and insuredVirginia Class A contractor #2705192276
24/7 emergency serviceOften same-day, and we will tell you honestly when we can get there.
Our own plumbers, our own trucksNobody here is a subcontractor with a magnet on the door
The price is settled before the workYou see the number in writing before anything is taken apart
What it costs
Same prices as our water heater flush page, anywhere in Northern Virginia, and you pay after the visit.
Tank water heater flush, with the plumbing check
$99, normally $199
Tankless descale, with the plumbing check
$300, regularly $350
Comfort+ membership, a water heater flush with a sewer camera inspection every year included
$199 a year
Both visits include a whole-home plumbing check: supply lines, shutoffs, a pressure reading, drains, toilets and traps.
One per household, owner-occupied homes, limited time. A leaking tank, or one that’s 15 years old, needs repair or replacement, not a flush.
More for the money: Comfort+ membership, $199 a year, includes the flush and its plumbing check every year, plus a sewer camera inspection, a dryer vent cleaning and heating and cooling maintenance visits.
What’s different in Warrenton
The Town of Warrenton makes its own drinking water. Its 2025 report lists the Warrenton Reservoir north of town, the Airlie Reservoir to the northwest and three wells, with the reservoir water treated at the Town’s plant on Blackwell Road and one well’s water softened before it goes out. What the report doesn’t print is a hardness figure. So the schedule doesn’t come from a lab sheet: a tank gets flushed once a year because sediment settles whatever the hardness, and the first bucket off the drain valve shows how much built up.
Every spring and fall the Town flushes its hydrants to scour the mains, and asks anyone who gets rusty or brownish water to run the cold water until it clears. Use a cold tap for that, not the hot one: whatever the crews stir up that you draw through the hot side goes straight into the tank. If your water went brown during a hydrant round, a flush once the round is over clears out whatever reached the heater.
Out past the town limits, New Baltimore and Vint Hill are on Fauquier County Water and Sanitation Authority systems drawn from drilled wells in fractured bedrock. The Authority’s 2025 report says iron and manganese in the New Baltimore wells can tint the water brown, and that its crews flush those mains on a rotating schedule every two months. Iron that does reach your house sinks to the bottom of the tank with everything else, which is one more reason to drain it yearly.
Farther out, past the county’s service districts, the house has its own well. Virginia Cooperative Extension’s Fauquier well clinics, 2012 to 2017, found water below pH 6.5 in 46 percent of samples, and the treatment people most often had was a sediment filter. Slightly acidic water works on the anode rod, so on a well the anode gets a close look every flush. We don’t work on wells or pumps; the flush starts at the tank.
Neighborhood by neighborhood
Census figures for each place, and what we’d look at first on a flush there. Median year built and heat count owner-occupied homes only.
| Place | Median home built | Most homes are | Heated with | What we’d look at first |
|---|---|---|---|---|
| New Baltimore | 1999 | single-family houses, nearly all | gas, about 5 in 10 | A yearly flush, and a look at the anode rod. |
| Warrenton | 1993 | single-family houses, about 5 in 10 | gas, about 6 in 10 | A yearly flush, and a look at the anode rod. |
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, a little over 4 of the roughly 110 square miles the two Warrenton ZIP codes cover: the Historic District around Main Street, Leeds Square, and the streets off Broadview Avenue and Alwington Boulevard.
New Baltimore only. It’s the one Census place on the county side with mostly Warrenton mail, so the farms and lots beyond it aren’t in these figures.
When it’s due
If the cold tap smells fine and only the hot side doesn’t, the tank is the likely source. An article FCWSA posts for its customers traces that smell to the tank’s magnesium anode rod, and the flush is a good time to check it.
That’s water boiling under a layer of sediment on the bottom of the tank. A flush clears it out.
Which is most houses. The drain valve at the bottom of the tank has usually never been opened.
Choosing who does it
Questions worth asking anybody you call, us included.
Town water, an FCWSA system and a private well each leave something different in a tank. Anybody flushing heaters around Warrenton should ask which one you’re on before deciding what to look at first.
The anode is the part that corrodes so the tank doesn’t, and the relief valve is the tank’s safety valve. A flush that skips both is just draining water.
A real descale isolates the heater at its service valves and pumps solution through the heat exchanger, then rinses it and cleans the inlet screen.
Two of our crew going over a work order before the day's calls.
From our Google reviews
5.0 stars across 1,132 reviews. Read them on our reviews page.
SwiftPro delivered and installed a 75 gallon AO Smith water heater. Zabi was very professional in his communication, plumbing, testing, and cleanup. Good crew to move new heater to basement utility room and take out the old heater.
Questions
The Town hasn’t published a number. Its 2025 water quality report covers the two reservoirs, the three wells and the treatment, softens one well, and prints no hardness figure. Flush a tank once a year regardless. For a tankless, the maker’s descale interval depends on hardness, and a test strip from a hardware store tells you which interval you’re on.
Yes, every year. A well brings its own grit, and a sediment filter upstream catches some of it, not all of it. Tell us when you book if there’s a softener or a filter in the line, so the tech knows what’s between the well and the heater.
$99 right now for a tank, normally $199, with a whole-home plumbing check. A tankless descale is $300 right now, regularly $350. Comfort+ membership, $199 a year, includes the flush every year.
Ready when you are
Call, or send the form at the top. Tell us tank or tankless, and the tech brings the right gear.
SwiftPro Heating, Cooling & Plumbing
4230 Lafayette Center Dr N, Chantilly, VA 20151
44679 Endicott Dr, Suite 211, Ashburn, VA 20147
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 Warrenton and the rest of Northern Virginia. Virginia contractor license #2705192276. 5.0 stars across 1,132 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.