A plumber in Oakton.
Plumbers for Oakton, 22124: leaks, drains, water heaters and the line to the street or the septic tank, priced from a published list first.
Drain cleaning for one fixture is $200 to $800 and toilet repair is $250 to $900, from our published price list.
- Prices in writing, first
- Camera before any dig
- Dedicated plumbing team
Get your plumbing job priced
Oakton drains two ways: to the county sewer, or to a tank in the yard.
Where an Oakton drain ends depends on the lot. The condos, townhouses and older streets along Chain Bridge Road and Blake Lane are on county sewer. North of Jermantown Road, Oakton Road and Waples Mill Road, in the headwaters of Difficult Run, Fairfax County’s plan keeps sewer out on purpose, and has since the Board of Supervisors reaffirmed it in May 1989, so a lot of the houses on those big lots run on a septic tank and a drainfield.
On septic, the county draws a clear line: plumbing problems inside the house go to a licensed plumber, and the tank and field outside go to a licensed septic contractor. A backup at the lowest drain can be either one. We start inside, and a camera in the line from the cleanout, $89 added to the visit, shows whether the pipe to the tank is blocked or broken before anybody pays to pump a tank that wasn’t the problem.
County code also says the tank gets pumped at least once every five years, and the contractor records each pump-out in the county’s PLUS system, so you can look up when yours was last done. The Health Department’s own list of what clogs a septic system starts with fats, oils and grease down the kitchen drain.
On the sewer side, the pipe era decides most calls. About four in ten Oakton homes went up before 1980, usually with copper supply and cast iron drains, and close to half in the 1980s and 90s, when grey polybutylene supply pipe was going in. The exception to the septic rule is a pocket north of I-66, west of Jermantown Road, that the county added to its sewer area after septic systems there failed, so a big lot isn’t proof of a tank.
What’s in the walls across Oakton.
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 |
|---|---|---|---|---|
| Oakton | 1981 | single-family houses, about 4 in 10 | gas, about 6 in 10 | The polybutylene years: check the supply pipe; PVC drains. |
| Difficult Run | 1982 | single-family houses, nearly all | gas, about 6 in 10 | The polybutylene years: check the supply pipe; PVC drains. |
Oakton houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
Oakton
ZIP 22124 as a whole: every Oakton address. The Oakton Census place in the table also takes in streets with Vienna and Fairfax mail.
- Median home built1984 Census
- Built before 1980about 4 in 10 Census
- Built since 2000about 2 in 10 Census
- Most homes aresingle-family houses, about 6 in 10 Census
- Heated withgas, about 5 in 10 Census
- Rentedabout 1 in 10 Census
- A lot of houses here went up while polybutylene supply pipe was in use, about 1978 to 1995, and it fails at the fittings.
What a plumber costs in Oakton.
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
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 a plumbing problem in Oakton usually looks like.
Every drain slows at once
On a septic lot, every drain slowing together, a tub that gurgles when the washer empties, or a soggy patch over the drainfield points outside the house, not at one pipe. That’s the septic contractor’s call, and a camera in the line tells you which side of the foundation the trouble is on.
Grey plastic pipe near the water heater
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.
Water where it shouldn’t be
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.
A drain that keeps coming back
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 storm in Oakton, check the basement drains.
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.
Water coming up a floor drain?
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.
Drains slow or gurgling since the rain?
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.
Is the sump pump running?
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.
Did water reach the water heater?
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.
Who owns what under the street in Oakton.
Fairfax County
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.
How to pick the best plumber in Oakton.
Questions worth asking anybody who comes out, us included.
Will they tell you where the plumbing ends and the septic begins?
On an Oakton septic lot it matters. A plumber should clear and camera the drains inside and the line out to the tank, then say plainly when the trouble is the tank or the field, which the county sends to a licensed septic contractor.
Is the plumber licensed in Virginia?
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.
Will they put a camera in before they talk about digging?
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.
Do you get the price before the work?
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.
What our customers say.
Tyson did a great job on several minor items along with repairing two toilets. He was courteous, quick, clean, and friendly.
5.0 stars across 884 Google reviews. Read them on our reviews page.
Plumbing questions from Oakton.
How do I know if my Oakton house is on septic?
Start with the water bill. Fairfax County says homes on public sewer are billed for it quarterly, usually through Fairfax Water, so no sewer charge on the bill usually means a tank in the yard. The county’s PLUS system also keeps the pump-out records for septic houses.
My Oakton house went up in the 1980s. Should I check the supply pipe?
Yes. Houses built from about 1978 to 1995 may have grey polybutylene, often stamped PB, and it tends to let go at the fittings. A plumber can tell in a few minutes at the water heater or under a sink. Repiping runs $1,000 to $12,000 depending on how much of the house it covers; our polybutylene guide explains the choices.
What if my septic fails and the county sewer is close by?
Fairfax County requires a failing septic system that can’t be repaired to connect to public sewer if the property is within 300 feet of an available sewer line. Past that distance, the Health Department works out the alternatives with you. The pipe from the house to the new connection is plumbing work, and it’s priced before anyone digs.
How much does a plumber cost in Oakton?
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.
Plumbers in the towns next door.
More from SwiftPro in Oakton
Tell us what the water is doing.
Call, or book online and pick a window. You get the price before the work, and if it can wait, we’ll tell you that too.
SwiftPro Heating, Cooling & Plumbing is a licensed, BBB Accredited (A rating), independently owned heating, cooling and plumbing company in Chantilly, serving Oakton 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.