Open 24/7 for emergencies
Water heater flushes and tankless descaling in Chantilly, 20151 and 20152, from our shop on Lafayette Center Drive. $99 for a tank flush right now.
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Rather talk now? (703) 997-9757
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 Chantilly
The county line runs through Chantilly, and the water company changes with it. In 20151 it’s Fairfax Water, which serves 97 percent of Fairfax County residents according to the county water plan. On the 20152 side toward South Riding it’s Loudoun Water, which prints no hardness figure and sends customers to Fairfax Water for one, because Fairfax Water’s Corbalis plant on the Potomac supplies much of its water. That plant ran 4.1 to 10.8 grains per gallon in 2025.
Most of 20151 went up in the 1980s and 90s. The original heaters are long gone, and the ones there now range from last year’s to worn out; the label settles which. The South Riding side is younger, its median home built in 2006 and nearly half of it townhouses, which means plenty of first tanks have reached the age when the anode rod gives out.
Loudoun Water’s own FAQ says calcium and phosphate build up inside the water heater, and that plastic bits in the faucet screens usually mean the heater’s dip tube is breaking down, which starts with a flush. If you’re finding white flecks in the aerators, mention it when you book; it changes what we look at first.
Our shop is on Lafayette Center Drive in 20151, so Chantilly is the shortest drive we make. Water heaters come up more often in Chantilly than in most towns we serve, and a yearly flush is the least expensive way to keep yours off that list.
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 |
|---|---|---|---|---|
| South Riding | 2006 | single-family houses, about 5 in 10 | gas, about 8 in 10 | Townhouses: utility rooms and closets, so we check the pan and the valves. |
| Chantilly | 1987 | single-family houses, about 6 in 10 | gas, about 5 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.
When it’s due
Plenty of South Riding heaters went in with the house around 2006. A tank that old and never flushed is a judgment call, because the drain valve can stick or drip once it’s opened, so we read the label and look the tank over before we drain anything.
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.
Yes. We work both sides of the county line, 20151 and 20152, at the same prices, from the shop in 20151.
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.
Arrived within an hour on a Sunday morning and provided great service.
Called SwiftPro around 5 am and their electronic system scheduled an appointment for us same day.
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.
Where we work
Next door to Chantilly: Centreville, Catharpin, Herndon, Aldie and Oakton.
Questions
Not much. Most of what Loudoun Water delivers is Potomac water, a lot of it treated at Fairfax Water’s Corbalis plant, which ran 4.1 to 10.8 grains per gallon in 2025. Both sides of Chantilly want the flush every year.
Yes, wherever it’s mounted. The descale runs through the service valves with a pump, and if yours has no valves, we price adding a set before we start.
$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 Chantilly 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.