Water heater flush in Leesburg.
Water heater flushes and tankless descaling in Leesburg, inside the town limits and out. $99 for a tank flush right now.
- Tank or tankless, any brand
- Priced before we start
- Pay after the visit
Book a flush or a descale
Inside Leesburg, the Town makes its own water from the Potomac.
Leesburg runs its own water plant on the Potomac, and the Town’s 2025 water quality report puts hardness at typically 100 to 150 parts per million, 5.8 to 8.8 grains per gallon, all of it river water that year. That’s moderately hard to hard: enough to leave sediment in a tank every year, and over the 4 grain mark where Navien puts a tankless on a yearly descale.
Outside the town limits, the supplier changes. Loudoun Water, for one, lists Lansdowne among the areas it serves, and its water leans on Potomac water treated by Fairfax Water. The flush rule doesn’t change much across that line, but the hardness figure worth going by is the one from whoever sends your bill.
Most of Leesburg’s houses went up after 1980, the median one in 1996, a bit under half single-family and about three in ten townhouses, with the historic downtown a small and much older exception. In the newer neighborhoods the original heaters are at replacement age or past it, and the date on the tank’s label tells us which side of that line yours is on.
Leesburg houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
Leesburg
- Median home built1996 Census
- Built before 1980about 2 in 10 Census
- Built since 2000about 4 in 10 Census
- Most homes aresingle-family houses, about 4 in 10 Census
- Heated withgas, about 7 in 10 Census
- Rentedabout 3 in 10 Census
- In Leesburg, about 7 in 10 owner homes heat with gas. If the water heater is gas too, the flush includes a look at the burner and the vent.
What a water heater flush costs in Leesburg.
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
- A tank flush on its own, normally$199
- Tankless descale, with the plumbing check$300
- A tankless descale, regularly$350
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.
Why people in Leesburg book a flush.
It pops or rumbles
That’s water boiling under a layer of sediment on the bottom of the tank. A flush clears it out.
Nobody knows when it was last done
Which is most houses. The drain valve at the bottom of the tank has usually never been opened.
The tankless throws a code
E016 or E030 on a Navien, LC on a Rinnai. Scale in the heat exchanger is the usual reason, and a descale is the fix.
How to pick who flushes your water heater in Leesburg.
Questions worth asking anybody you call, us included.
Does it matter if I’m just outside the Leesburg town limits?
For the flush itself, no. For the schedule, a little: outside the town you’re on another supplier’s water, so the hardness we go by comes from your bill rather than the Town’s report.
Do they check the anode rod and test the relief valve?
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.
On a tankless, do they pump descaler through it?
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.
What our customers say.
This Company installed a tankless water system!!! They were great!!! Very Professional & Efficient & they Cleaned up & took out the old water tank! I would highly recommend them!!
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
5.0 stars across 884 Google reviews. Read them on our reviews page.
Water heater flush questions from Leesburg.
Is Leesburg’s water hard?
Moderately hard to hard. The Town’s 2025 report gives typically 100 to 150 parts per million, 5.8 to 8.8 grains per gallon, from its Potomac plant. Once a year for a tank, and once a year for a tankless without a softener.
How often should a Leesburg water heater be flushed?
Every year for a tank on Town water, starting the first year. Sediment builds steadily at 5.8 to 8.8 grains, and a year’s worth flushes out far easier than a decade’s.
How much does a water heater flush cost in Leesburg?
$99 right now for a tank, with a whole-home plumbing check. The flush on its own is normally $199. A tankless descale is $300 right now, regularly $350.
Water heater flushes in the towns next door.
More from SwiftPro in Leesburg
Book the flush, tank or tankless.
Call, or book online and pick a window. Tell us tank or tankless, and the tech brings the right gear.
SwiftPro Heating, Cooling & Plumbing is a licensed, BBB Accredited (A rating), independently owned heating, cooling and plumbing company in Chantilly, serving Leesburg and the rest of Northern Virginia. Virginia contractor license #2705192276. 5.0 stars across 884 Google reviews. SwiftPro maintains a dedicated HVAC team and a dedicated plumbing team.
SwiftPro Heating, Cooling & Plumbing, 4230 Lafayette Center Dr, Suite N, Chantilly, VA 20151, (703) 997-9757. Book online, read our reviews, or see every town we serve.