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
Send this and the office calls or texts you back to set a time.
We’ll call or text this number about your request. By sending it you agree to our terms and privacy policy.
Rather talk now? (703) 997-9757
Plumbing in Haymarket, in the Town, Dominion Valley and up on Bull Run Mountain: leaks, slow drains, septic lines and water heaters, priced 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 Haymarket
Inside the town limits, the Town sends you to Prince William Water for both water and sewer, so the utility’s rules on this page hold there just as they do in the county. Prince William Water counts Dominion Valley in the same Haymarket system, fed from surface water: Potomac River water that Fairfax Water treats at Corbalis, mixed with what the City of Manassas draws and treats from Lake Manassas. The pressure reducing valve on your incoming line is yours to keep up, and so is the pipe on your side of the property. Heavy rain tests that sewer. Prince William Water lists storm water and groundwater seeping into sewer pipes through cracks among the causes of overflows, and the Town’s hazard plan ranks flash flooding a high risk. A lowest drain that gurgles in a downpour deserves a camera look before it backs up.
Bull Run Mountain Estates and Evergreen run on something else. Prince William Water serves a small cluster of homes there from six wells, a separately permitted system that by its permit can’t tie into the Haymarket one, and it treats that water with sodium hydroxide to keep it from eating at household plumbing. Neighbors who aren’t on it pump from private wells, where any treatment is the owner’s call. Copper is where untreated, aggressive well water shows itself, as pinhole leaks years before the pipe looks old.
Off public sewer, waste goes to a septic tank, and Prince William County Code 23-48 wants a pump-out at least once every five years; the Virginia Department of Health’s Prince William Health District oversees septic systems and wells in the county. When drains slow down in a house on septic there are two suspects, the pipe out to the tank and the tank itself, and a camera run through the cleanout tells them apart before anyone backs up a pump truck.
The pipe in the walls follows the age of the house. In the Town the median owner home is from 1995, and about six in ten homes went up in the 1980s and 90s, the same stretch when builders were still running polybutylene for water lines; grey plastic stamped PB near the water heater is worth a look. The 2000s houses that make up most of 20169 usually carry PEX or copper water lines and plastic drain pipe, and their original pressure reducing valves are old enough now to start letting the pressure creep up.
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 |
|---|---|---|---|---|
| Bull Run Mountain Estates | 1978 | single-family houses, nearly all | electricity, about 4 in 10 | Copper supply, cast iron drains. |
| Haymarket | 1995 | single-family houses, about 6 in 10 | gas, about 6 in 10 | The polybutylene years: check the supply pipe; PVC drains. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
Inside the town limits only, about one in eighteen of the owner homes with Haymarket mail. Dominion Valley, Piedmont and Bull Run Mountain Estates sit outside it, in the county.
ZIP 20169 as a whole: every Haymarket address, the Town’s homes included.
What you’d notice
On well water, a blue-green ring in a sink or tub usually means the water is acidic enough to dissolve copper from the inside of the pipe. Prince William Water treats its mountain wells against exactly that; a private well gets it only if the owner adds a neutralizer, and the pinhole leaks come later.
Polybutylene, often stamped PB, went into houses from about 1978 to 1995. It tends to let go at the fittings with no warning, so it’s worth knowing whether you have it.
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.
One slow sink is a sink. Two slow drains on different floors are sharing the pipe out to the street, and a basement drain that gurgles while you run water upstairs is the main line talking.
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
Prince William Water requires its own Lateral Repair or Replacement Permit, and its inspection, before anyone repairs or replaces a sewer lateral outside the house. Source.
Prince William Water says the pressure reducing valve is the homeowner’s to install and keep up, that the plumbing code recommends one where pressure runs 80 psi or more, and that pressure rises with the height difference between your house and the water tank serving 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.
In 20169 the answer can be Prince William Water’s main system, its wells on Bull Run Mountain or your own well, and a leak, a pressure problem or a stain points somewhere different on each. Expect that question on the first call.
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.
Zabi was friendly, timely, professional and did an excellent job on the plumbing work we had done. He was a pleasure
Where we work
Next door to Haymarket: Gainesville, Catharpin, Broad Run, The Plains and Aldie.
Questions
Yes. The Town lists the Prince William County Service Authority, which now goes by Prince William Water, for water and sewer, so a lateral repair outside the house needs that utility’s own permit, the same as in the county. For gas, the Town lists Columbia Gas of Virginia.
Prince William Water says nobody on Bull Run Mountain or in Evergreen has to connect, and anyone there can apply through its usual service connection process. Its mountain system runs only on wells and can’t join the Haymarket system. We don’t work on wells; we take the plumbing from where the water comes into the house.
At least every five years under Prince William County Code 23-48, and more often for a big household. If drains are slowing between pump-outs, a sewer camera inspection added to a visit, $89, looks at the line out to the tank first.
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 Haymarket 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.