Open 24/7 for emergencies
A tank flush is $99 right now with a whole-home plumbing check; a tankless descale is $300, regularly $350.
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Water heater flushing in Philomont, tank or tankless, timed to a well test or to the Loudoun Water line you’re on.
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 Philomont
A county brochure says about a quarter of Loudoun residents depend on groundwater, mostly in the western and northern parts, and most of them on a private well on their own lot. Philomont sits in the center of the Loudoun Valley, so work out first which kind of house you have. A well has no utility report behind it. The brochure adds that yields vary because the water comes from fractures in bedrock, so the only word on one well’s minerals is its own test.
If your bill comes from Loudoun Water, the hardness answer is a detour. Look for hardness in its 2025 report and it isn’t there; the utility’s own water quality page directs you to Fairfax Water’s Corbalis data instead. We use what you have: your test, or the Corbalis data for a Loudoun Water address. We don’t do well work, so for a well this is advice only: test it, then set the flush by the result.
Tank age is the other half. The median owner home in ZIP 20132, the Purcellville ZIP area Philomont sits in, dates to 2000, about 24 percent of homes there predate 1980, and nearly half went up since 2000. A tank that has gone unflushed in a house that age is likely the second or third one in it. On an electric tank, sediment piles over the lower element; on a propane tank, it sits between the burner and the water.
Early fall is the window. At the Purcellville station the median first fall low of 32F lands on October 25, and the winter ahead brings 4,942 heating degree days. A flush now, with the anode rod and relief valve checked, puts what drains out in front of you before the hard cold and the heavy use arrive.
By the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
Philomont’s own ZIP, 20131, is post office boxes only, so the Census Bureau maps no area for it. These are ZIP 20132 as a whole, the Purcellville ZIP area Philomont sits in, the Town of Purcellville included.
When it’s due
That noise is water trapped under a layer of sediment, boiling up through it. It points to a tank that needs a flush soon, and in Philomont how much sediment depends on the source: a well varies from well to well, and a test tells you. Loudoun Water prints no hardness of its own.
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.
A flush plan built without that answer is a guess. Ask whether the company wants to know if you are on a well or Loudoun Water, whether it checks the anode rod and relief valve at the same visit, and whether it wants to see your water test if you have one.
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.
I had a really pleasant personal experience with Swiftpro when my water heater went out. The pricing was very reasonable compared to the many other HVAC companies I sought quotes from. I highly recommend them
Where we work
Next door to Philomont: Middleburg, Round Hill, Bluemont, Purcellville and Hamilton.
Questions
Yearly is a sound default, and your water adjusts it. Heavier sediment needs more attention, lighter needs less. Loudoun Water prints no hardness, and a well takes a test. A tank flush is $99 right now, regularly $199, and a tankless descale is $300.
It can be, and the test decides how often. Wells differ from one lot to the next, so what settles in your tank can’t be read off the neighbor’s. We stay away from the well, pump and pressure tank. The heater itself is our job: the flush, a look at the anode rod and relief valve, and the sediment laid out for you to see.
$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 Philomont 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.