Open 24/7 for emergencies
Drain cleaning for one fixture is $200 to $800 and toilet repair is $250 to $900, from our published price list.
Get your price in writing
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Rather talk now? (703) 997-9757
A plumber for Annandale, 22003: basement backups, slow drains, old sewer laterals, leaks and water heaters, each job priced from our published list first.
5.0 stars across 1,132 reviews
Part of our plumbing team, with the drain machine, the sewer camera and the jetter they bring to the house.
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
The same list as our plumbing page, every line a range because the house decides where it lands. You get the number before the work starts.
Drain cleaning, one fixture
$200 to $800
Main sewer line cleaning
$550 to $1,650
Sewer camera inspection, added to a visit
$89
Leak detection
$200 to $500
Toilet repair
$250 to $900
Pressure reducing valve replacement
$500 to $1,000
Water heater replacement
$2,757 to $10,486
or $46/mo at 0% APR for 60 months
Monthly figures: 60mo @ 0% APR on each starting price, the whole price financed, on approved credit. Longer plans lower the payment and cost more in total. The lender sets the final terms. How financing works
A sewer camera inspection is $89 added to a visit we’re already making. It’s the cheapest way to know what a drain is doing before anybody talks about digging.
With Comfort+ membership, any service is 15% off, and a water heater flush with a sewer camera inspection and a plumbing safety inspection comes every year.
What’s different in Annandale
Most Annandale houses went up in the 1960s, many with a basement or lower level, and the lowest opening is usually a floor drain by the furnace or a laundry tub by the washer. That’s where a blocked sewer shows itself first. The drain under that floor is usually cast iron, and in the Annandale Census place, where more than a quarter of homes predate 1960, the supply overhead may still be galvanized steel in places.
Fairfax County asks for one step before any plumber: if sewage is coming up, call its 24-hour line so an inspector can check the county main. Sewage rising when nothing in the house is running points at the county’s pipe; a backup only when you flush, shower or run the washer points at yours. If the main checks out, the county sends you to a plumber, since the lateral to that main is yours.
A lateral laid in the 1950s or 60s could be cast iron, clay tile, or Orangeburg, a tar-soaked wood-fiber pipe used until the early 1970s that slowly flattens under the soil. Roots work into the joints of all three. A camera, $89 added to a visit, shows which pipe you have and where it’s failing before anybody prices a dug replacement at $7,500 to $9,000.
Two more county rules matter in a basement house. A sump pump, downspout or French drain piped into the sanitary sewer is illegal in Fairfax County, because rainwater overloads the system and can push sewage into basements. And the county tells owners with fixtures below ground to check that their home insurance covers sewage backup, which can be an add-on.
Neighborhood by neighborhood
Census figures for each place, and the pipe that usually goes with houses that age. Median year built and heat count owner-occupied homes only.
| Place | Median home built | Most homes are | Heated with | The pipe you usually find |
|---|---|---|---|---|
| Annandale | 1967 | single-family houses, about 5 in 10 | gas, about 7 in 10 | Copper supply, cast iron drains. |
| Wakefield | 1968 | single-family houses, nearly all | gas, about 8 in 10 | Copper supply, cast iron drains. |
| Woodburn | 1968 | single-family houses, about 4 in 10 | gas, about 6 in 10 | Copper supply, cast iron drains. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
What you’d notice
A washer dumps a lot of water fast. If the basement floor drain or the laundry tub burps, rises or smells when it does, the main line is usually partly blocked past both. Hold off on the next load; main sewer line cleaning runs $550 to $1,650.
Galvanized steel supply pipe rusts from the inside, so the pressure falls slowly until a shower upstairs is a trickle. The fix is new pipe, not a new faucet.
Old cast iron drain pipe rusts through along the bottom where the water sits. A smell with no source, or a basement floor drain that backs up, is the usual sign, and the camera tells you for sure.
A damp patch on a ceiling, a warm spot on the floor, a meter that keeps ticking with every tap off. A slow leak inside a wall does most of its damage before it ever shows itself.
After a heavy rain
Heavy rain finds the weak spots in a house’s plumbing. Four checks you can make yourself, then call us and we’ll look at the rest.
Clear water with no smell is usually groundwater. Gray water, or a sewer smell, means the main line is backing up: stop running water in the house and call us.
A main line with a cracked joint or roots in it can take in groundwater during a storm and slow down. A sewer camera inspection, $89 added to a visit, shows where.
If the house has one, watch it once: it should start as the pit fills, empty it and shut off. Our sump pump replacement page has the rest of the checks.
If floodwater got to a gas water heater’s burner or controls, leave it off. Don’t relight it until a plumber has checked it.
Call us after a storm and we’ll check it all: the floor drains, the main line, the sump pump and the water heater. Any repair gets its price in writing before the work starts.
Your pipes, your paperwork
In Fairfax County the homeowner owns the whole sewer lateral, from the house to the county main, including the stretch under the street. Replacing it takes a county plumbing permit, plus a VDOT permit under a state road. Source.
Fairfax Water promises 20 psi at the main and no uniform pressure, and the pressure reducing valve on your side of the meter is yours to buy and keep up. Over 80 psi, the Virginia Residential Code calls for one, and an expansion tank with it. Source.
Our Virginia Class A contractor license, 2705192276, is on the side of the van.
Choosing a plumber
Questions worth asking anybody who comes out, us included.
For a sewage backup, Fairfax County wants its own inspector on the public main first. A plumber who asks that, and whether it backs up with every fixture off, keeps you from paying to clear a line that wasn’t the problem.
Anyone can check on the state’s license lookup in about a minute. It’s the one question that takes the guesswork out of the rest.
A sewer camera inspection is cheap next to any dig, and it shows whether the problem is a root, a sag or a break. A quote to dig without one is a guess.
Every plumbing job on our list has a range. A plumber who won’t say where yours lands until the wall’s open is asking for a blank check.
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.
Plumber showed up on time and fixed my drain clog without issue. Very reasonably priced as well. Highly recommended.
Where we work
Next door to Annandale: Falls Church, Springfield, Dunn Loring, Burke and Fairfax.
Questions
Fairfax County’s 24-hour line, before any plumber; the county asks for that. Plug the tub, sink and floor drains, weigh them down if needed, and stop running water. If the county finds its main clear, the trouble is in your lateral, and that’s when we come with the drain machine and the camera.
Yes. Main sewer line cleaning runs $550 to $1,650, and a camera afterwards shows what the roots left. If they keep coming back, the county suggests plastic pipe or cutting on a schedule, and after any root cutting it asks for a call to its 24-hour line so its crew can clean the main too.
They can. Fairfax County keeps its sanitary sewers apart from its storm drains, but rain still gets into the sanitary side through cracked old laterals and through sump pumps and downspouts piped in where they shouldn’t be, and the county says that extra water can overload the system and push sewage into basements. About 8 in 10 Annandale homes went up before 1980, so plenty of laterals here are old enough to leak. If a floor drain burps or rises during a storm and settles down after, a camera, $89 added to a visit, shows whether your line is letting water in.
It depends on the job, and every one has a published range: drain cleaning for one fixture $200 to $800, main sewer line cleaning $550 to $1,650, leak detection $200 to $500, a pressure reducing valve replacement $500 to $1,000, toilet repair $250 to $900. A sewer camera inspection added to a visit is $89.
Ready when you are
Call, or send the form at the top. You get the price before the work, and if it can wait, we’ll tell you that too.
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 Annandale 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.