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A tank water heater flush in Calverton is $99 right now, normally $199, with a whole-home plumbing check. On a well, the tank shows what it carries.
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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 Calverton
No public water system reaches Calverton, so nearly every house draws from its own well; outside the Town of Warrenton, the County’s plan says, Fauquier residents rely on groundwater alone. No utility publishes a hardness figure for your tap. Whatever your well carries, the water heater collects: as the water heats, minerals and grit fall out and settle on the bottom of the tank, year on year.
When Virginia Tech’s well clinics tested 97 Fauquier County wells between 2012 and 2017, iron and manganese were among the most common problems, and both settle in a tank as a rust-brown or black sludge. The wells ran from 50 to 705 feet deep, so two houses on the same road off Route 28 can have very different water. The first bucket off your drain valve shows what yours is bringing in.
Those clinics also found a pH below 6.5 in close to half the samples. Acidic water works on copper and on the anode rod, the part that corrodes so the steel tank doesn’t, so on a Calverton well the anode check tells you the most. An acid neutralizer ahead of the heater raises the pH by dissolving calcite into the water, which adds hardness, and scale tends to build faster behind one.
Most Calverton drains run to a septic tank, or inside the County’s small sewer district to a STEP tank. We’d rather run the flush hose outside, downhill and clear of the wellhead, than send a tank’s worth of sediment into either. The nearest weather station’s median last freeze is April 9 and its first is November 1; book between them and the hose won’t freeze on the lawn.
By the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
Calverton’s own ZIP, 20138, is post office boxes only, so the Census Bureau maps no area for it. These are ZIP 20119 as a whole, the Catlett ZIP area that holds nearly nine in ten of the Calverton Census place’s homes.
When it’s due
A new pump, a long outage or work at the wellhead can stir up sediment, and the water heater catches what comes through. If the cold runs clear again and only the hot stays tinted, the tank is holding it, and a flush is what clears 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.
On a well, what the filter or neutralizer lets through decides how often the flush is due. Ask the tech to note how much came out of the tank, so next year’s flush has a comparison.
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.
Questions
Virginia Tech’s shock chlorination guide says private water systems should be chlorinated after any flooding, and suggests draining the water heater to help flush the chlorine out of the plumbing, with the gas or electricity off first. The chlorinating is a well contractor’s job. Draining and refilling the tank is a flush, and the sediment leaves with it.
Once a year is the usual place to start. On a well with iron, manganese or a neutralizer ahead of the heater, the first flush tells you more: a heavy bucket says keep it yearly, and a clear one says the filter is doing its job.
$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 Calverton 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.