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.
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A plumber in Lorton for leaks, drains, water heaters and sewer lines, and for the pipe out to a septic tank on Mason Neck. Prices in writing 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 Lorton
Septic is a real part of plumbing in Lorton: the county health department holds septic permits on over a thousand Lorton parcels. Roughly half sit on Mason Neck, on streets like River Drive, Gunston Road and Belmont Boulevard; most of the rest are on Old Colchester Road or the bigger lots off Ox, Hooes and Lorton Roads. The townhouse streets are on county sewer. So the first thing we ask on a Lorton drain call is which one you have, because it changes what a backup means and whose job the fix is.
On septic, the county splits it at the foundation: a problem inside the house is a licensed plumber’s, and everything from the tank outward belongs to a septic contractor the county licenses. A slow drain in one bathroom is ours. When everything slows at once, we clear the line from the cleanout and put a camera in it, $89 added to the visit, so you know whether the pipe to the tank or the tank itself is the trouble before you book a pump truck.
Newington is the older end of town: median home 1981, and about half its homes built before 1980. A house from the 1970s usually drains through cast iron inside the walls, which rusts thin along the bottom where the water runs, while the early 1980s houses fall in the polybutylene years for supply pipe. Either way, a sewer camera inspection of the main line and a glance at the supply line leaving the water heater tell you most of what you need, and our polybutylene guide covers what replacing grey PB involves.
Laurel Hill’s houses are this century’s, mostly PEX or copper supply with PVC drains, and their trouble is younger: original water heaters past their years, shutoff valves nobody has turned since the closing, and the pressure reducing valve the builder put in by the main. Lorton’s tap water is Fairfax Water’s, most of it treated at the Griffith plant on the Occoquan, and it tested 3 to 8 grains per gallon in 2025, enough to crust a showerhead or a faucet aerator in a year or two.
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 |
|---|---|---|---|---|
| Lorton | 2001 | single-family houses, about 4 in 10 | gas, about 7 in 10 | Copper or PEX supply, PVC drains, original water heaters aging out. |
| Newington | 1981 | townhouses, about 6 in 10 | electricity, about 6 in 10 | The polybutylene years: check the supply pipe; PVC drains. |
| Laurel Hill | 2002 | single-family houses, about 4 in 10 | gas, about 8 in 10 | Copper or PEX supply, PVC drains, original water heaters aging out. |
| Mason Neck | 1973 | single-family houses, nearly all | electricity, 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.
ZIP 22079 as a whole: every Lorton address. Most of Newington, in the table, has Springfield mail.
What you’d notice
In a Laurel Hill house from around 2002, the pressure reducing valve by the main shutoff is usually the original, and they tend to wear out at about that age. When one lets the pressure creep up, toilets refill by themselves, faucets drip and the pipes knock when a valve shuts. A gauge on an outside spigot settles it; over 80 psi, the valve is due, and replacing it runs $500 to $1,000.
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
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.
On a Mason Neck lot a backup can be the pipe or the tank, and only one of those is a plumber’s. The plumber should clear what’s inside, run a camera out toward the tank, and show you what it found before anyone with a pump truck gets the 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.
SwiftPro delivered and installed a 75 gallon AO Smith water heater. Zabi was very professional in his communication, plumbing, testing, and cleanup. Good crew to move new heater to basement utility room and take out the old heater.
Where we work
Next door to Lorton: Fort Belvoir, Springfield, Woodbridge, Fairfax Station and Burke.
Questions
At least once every five years under Fairfax County code, and sooner for a full house or a small tank. The contractor who pumps it enters the date in PLUS, the county’s permit system, so you can look up the last one by address. Pumping is the septic contractor’s work; the drains and the pipe out of the house are ours.
On an older Newington house it’s cheap insurance, because roots and sags in a forty-year-old line don’t show at a showing. On a septic lot, pair it with the pump-out history in PLUS and a septic contractor’s look at the tank and field; the camera covers the run from the foundation out to the tank inlet, and it’s $89 added to a visit.
Usually. The camera head carries a small transmitter, and a locator picks it up through the ground, so we can mark the line’s path across the yard and roughly where it meets the tank. Worth doing before a fence, a patio or an addition goes in, and it’s $89 when we’re already there for something else.
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 Lorton 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.