Open 24/7 for emergencies
A tank flush in Hamilton is $99 right now and a tankless descale $300, on Town well water whose report prints no hardness figure.
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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 Hamilton
Hamilton’s Town water comes from three wells inside the town, one kept back for emergencies, and every one is chlorinated and treated to take out iron and manganese. The Town’s 2023 plan draft counts 665 water customers, about 443 of them outside or next to the town line. What the 2025 water quality report leaves out is a hardness number, so there is no published number to set a flush schedule by.
That makes the flush itself the measurement. What comes out of the drain valve tells you what the tank has been collecting: white or tan grit is the minerals the water carries, rust-brown is iron, black flecks are usually manganese. Your plumber can read it in the bucket and tell you whether once a year is enough.
Past the Town’s mains, homes in 20158 draw from their own wells. Loudoun County’s own brochure says about a quarter of county residents, mostly in the west and north, rely on groundwater, and that well yields swing from lot to lot because the water rises through cracks in the bedrock. A well with no filter can send sand, rock dust and untreated iron straight into the water heater. We flush the tank and check the plumbing; the well, its pump and its pressure tank are a well company’s.
About three owner homes in ten burn propane, and if your water heater does too, the visit takes in the burner, its flame and the draft at the vent along with the sediment. Every flush also comes with a pressure reading, and the Town’s plan notes that pressure tends to fall off somewhat at the east end of town. A low reading there may be the Town’s system; a high one is worth a look inside.
By the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
ZIP 20158 as a whole: every Hamilton address, the Town and the countryside around it. The Census place for the Town alone has too few homes for steady figures.
When it’s due
If the cold taps run clear and the hot ones come out tinted, the color is coming from the tank: settled iron or manganese stirred up off the bottom. A flush is where to start, and on a well without an iron filter it tends to come back sooner.
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.
With no hardness figure published for Hamilton’s Town water, the sediment in the bucket is the best evidence of how often your tank needs this. Ask the plumber to show it to you, and to set the next flush by what came out.
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.
Had the water heater replaced and a quote for my HVAC. Both technicians were friendly and helpful. Prices were decent. Would use again.
Where we work
Next door to Hamilton: Paeonian Springs, Waterford, Purcellville, Leesburg and Lovettsville.
Questions
Start with once a year, since there’s no published hardness to argue for less. If the first flush comes out thick with grit, keep it yearly. A tankless follows the same logic: descale it at $300 on a schedule set by what the first one finds.
Usually, yes. A softener takes out the hardness that turns into scale, but sand or silt from the well can slip past it and settle in the tank. Keep the softener’s salt topped up, and let the flush clear what it can’t catch.
$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 Hamilton 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.