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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Rather talk now? (703) 997-9757
Paeonian Springs water heater flush: propane is the main fuel here, and the permit is handled. See prices below.
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 Paeonian Springs
Most homes in ZIP 20129 heat with propane, not natural gas. Census data shows about four in ten owner homes use propane, while gas is at zero. That makes your water heater likely a propane unit. If you are replacing it, the installation labor and permit cost are identical in our price book. Knowing this upfront saves you from guessing which fuel type to request when you call. The fuel line connection is different, but the work is the same.
The water here is hard. Loudoun Water does not print its own hardness figure but points customers to Fairfax Water’s Corbalis data. That hardness drops sediment into your tank year after year. The yearly flush is how you get it out before it insulates the element or clogs the burner. If you hear rumbling or notice less hot water, that sediment is the usual suspect. A descale at $300 can help in between full flushes.
Storms are a real factor in this part of Loudoun. The 2024 July wind event and the 2022 June storm both brought down trees and wires near Paeonian Springs. If a storm takes out power, your electric water heater stops working. If it damages the vent, that is a safety issue. Check your carbon monoxide alarms after any storm, especially if you have a propane unit. Loudoun County fire and rescue recommends testing them monthly.
Swapping a propane water heater in Loudoun County needs a permit. Since October 2025, if the new unit has the same BTU rating and stays in the same location, you do not need to submit plans. If your tank bursts, Virginia’s building code allows you to start the replacement immediately, provided the permit application reaches Loudoun County by the end of the next working day. We manage that paperwork so you can get back to hot water without waiting on forms.
When it’s due
Hard water drops sediment into the tank. That sediment insulates the heating element or burner, so the water takes longer to heat or does not get as hot. A yearly flush removes it. If the rumbling is loud or the water is barely warm, the tank may be nearing the end of its life.
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.
Propane and natural gas use different regulators and fittings. A careful installer inspects your existing line before quoting for a propane tank. If the line is outdated or the wrong diameter, they will let you know before installation so you are not surprised by extra work or parts.
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.
James plumbing Tech was Friendly and Professional. Very well communicated. My water heater tank is top-notch and looks awesome. Highly recommend James nickname (Jimbo)and customer service. Thank you guys
Where we work
Next door to Paeonian Springs: Waterford, Hamilton, Leesburg, Lovettsville and Purcellville.
Questions
No. Propane and natural gas have different pressures and orifice sizes. You need a tank rated for propane. Our price book lists the same labor for both, but the unit itself must match your fuel source. We verify the fuel type before we quote.
Once a year is the standard for hard water areas like Paeonian Springs. The flush removes the sediment that builds up from the hardness. If you skip it, the sediment can insulate the element or clog the burner, leading to higher energy bills or a failed tank.
$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 Paeonian Springs 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.