Sump pump replacement in Fairfax Station.
Sump pump replacement in Fairfax Station: $697 installed in your existing pit. A new pit, a battery backup, outside drain work or new wiring is extra.
- Cast iron pump, quiet check valve
- Extras priced in writing first
- Dedicated plumbing team
Book your sump pump replacement
A basement under almost every Fairfax Station house, and a finished room in most.
Fairfax County’s assessment records list a basement under about 97 in every 100 houses with a Fairfax Station address, nearly all of them full, and about 8 in 10 of those basements have a finished rec room. So a sump pump out here is rarely guarding bare concrete. It’s guarding carpet, drywall and the family room. The records don’t say which basements have a pit, and not every one does.
At least 6 in 10 are what the county calls daylight basements, with one wall out of the ground where the lot falls away. Groundwater moving downhill meets the uphill wall first, and the drain along the footing carries it around to the pit. The discharge usually leaves on the low side, and on a slope it has to run far enough downhill that the water doesn’t soak back toward the foundation.
On a septic lot the water has one more place to stay away from. Fairfax County’s septic code bars basement sump discharges, along with roof, floor and footing drains, from connecting to the septic system, and wants them sent away from the drainfield so no water flows into, through or over it. A sump line emptying toward the field soaks the very ground the system needs to drain. About 3,000 Fairfax Station properties are on septic, so when we replace a pump here we check where its line ends, not just what’s in the pit.
About 1,700 of those septic lots also draw from a private well, and on those houses a power cut stops two pumps at once: the one bringing water in and the one keeping it out of the basement. A battery backup beside the main pump is the part that keeps working when the lights go out.
Sump pumps across Fairfax Station, place by place.
Census figures for the owner-occupied homes in each place, and what to check on a sump pump in houses that age.
| Place | Median home built | Most homes are | Heated with | What to check |
|---|---|---|---|---|
| Fairfax Station | 1982 | single-family houses, about 9 in 10 | gas, about 5 in 10 | 1980s and 90s basements: an original pump is long overdue. |
| South Run | 1988 | single-family houses, nearly all | gas, about 9 in 10 | 1980s and 90s basements: an original pump is long overdue. |
| Crosspointe | 1993 | single-family houses, nearly all | gas, about 8 in 10 | 1980s and 90s basements: an original pump is long overdue. |
Fairfax Station houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
Fairfax Station
ZIP 22039 as a whole: every Fairfax Station address. The Fairfax Station Census place in the table also takes in streets with Fairfax mail.
- Median home built1988 Census
- Built before 1980about 1 in 10 Census
- Built since 2000about 1 in 10 Census
- Most homes aresingle-family houses, nearly all Census
- Heated withgas, about 6 in 10 Census
- Rentedhardly any Census
- A basement from the 1980s or 90s is several pumps in by now, or overdue for its next one.
What sump pump replacement costs in Fairfax Station.
The same price as our sump pump replacement page: one flat number for a new pump in a pit that’s still sound, with what costs extra named right beside it.
- Sump pump replacement, installed in your existing pit$697
- Sump pump and battery backup, installed together$3,200
- A new or deeper pit, discharge line work outside, or a dedicated circuitPriced in writing before we start
$697 covers a new cast iron pump, a quiet check valve, new PVC up to your existing discharge line, a battery water alarm by the pit, the old pump hauled away and a bucket test before we leave.
A battery backup keeps pumping through a power outage, and the outage usually comes with the storm. With a new pump, the pair is $3,200 installed. The sump pump estimator helps you decide whether you need one.
When a sump pump in Fairfax Station needs replacing.
The ground over the drainfield stays soggy after rain
Follow the sump line outside. If it empties on the same downhill side as the drainfield, the pump may be wetting the field every time it runs. Moving the outlet is discharge line work outside, priced in writing before we start.
You’re in Fairfax County and want a backup
The county’s Flood Mitigation Assistance Program pays back half of a battery backup, up to its cap, after the work is done and paid for. Not the pump itself, and not homes in the Town of Vienna, the Town of Herndon or the City of Fairfax.
It’s past seven years old
Zoeller, who make a lot of the pumps around here, puts a sump pump’s life at seven to ten years. Past seven, replace it on your schedule instead of the storm’s.
After a storm in Fairfax Station, check the sump pump.
Six checks you can make yourself once the rain lets up, none of them with your hands in the pit. Then call us and we’ll check it all.
Does the pump kick on?
Watch the pit during the rain or right after. The pump should start as the water rises, empty the pit and shut off. A full pit, or a pump that hums and moves nothing, isn’t keeping up.
Is there water where it shouldn’t be?
Walk the basement: the corners, the walls, the floor by the pit, under the water heater and the furnace. Photograph any wet spot before you mop, so we can see where it came in.
Is the discharge line clear?
Outside, find where the pump’s pipe ends. It should be open, not crushed, buried or full of leaves, and aimed away from the house so the water doesn’t run back to the foundation.
Does the check valve hold?
Listen when the pump shuts off. Water rushing back into the pit means the check valve isn’t closing, and the pump has to move that water again.
Did the power go out?
The pump stops when the power does, often at the height of the storm. If the basement took water during an outage, that’s the job a battery backup does.
Water near an outlet? Stay out.
If water is standing near the pit, an outlet or anything plugged in, don’t wade in to check. Call us, and only switch the power off at the panel from somewhere dry.
Not sure what you saw? Call us after a storm and we’ll check it all: the pump, the float, the check valve, the discharge line and where the water came in. If the pump can’t keep up, a new one is $697 installed in your existing pit; a new or deeper pit, a battery backup, discharge line work outside and a dedicated circuit are extra, priced in writing before we start.
How to pick the best plumber for a sump pump in Fairfax Station.
Questions to ask anybody who quotes you, us included.
Did they ask whether the house is on septic?
In Fairfax Station it changes the job. On a septic lot the discharge has to stay clear of the drainfield, and nobody can judge the existing line without knowing where the field is. Point out the tank lid and the field when the tech arrives.
Is the price for the whole job?
Ask what the number covers: the pump, the check valve, the pipe, hauling the old one off, a test before they leave. Then ask what costs extra, and get it in writing.
What’s the new pump made of?
Cast iron, ideally. Plastic pumps cost less and are usually the ones that quit early. Ask before the old one comes out.
Do they look at where the water goes?
A discharge line that’s cracked, buried or frozen shut every January leaves the new pump pushing against a closed pipe. Whoever replaces it should check the outside end too.
What our customers say.
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Sump pump questions from Fairfax Station.
Can my Fairfax Station sump pump drain into the septic system?
No. Fairfax County’s Individual Sewage Disposal Facilities Code prohibits connecting a basement sump discharge to a septic system and wants it directed away from the drainfield. If yours runs into a house drain or a laundry sink, that water ends up in the tank and the field. Rerouting it outside is discharge line work, priced in writing first.
Where is the sump pit in a finished Fairfax Station basement?
Usually in the unfinished part: the furnace room, under the stairs or a utility closet, as a lidded basin set into the floor. Some get boxed in behind an access panel when the basement is finished. Can’t find one? The house may simply not have a pit.
Fairfax Station Road was under water again. Should I check the sump?
Yes, once it’s safe to go down. On July 12, 2025, Weather Service reports had at least a foot of water flowing across Fairfax Station Road near Piney Branch. Between July 24 and August 1, 2018 they logged Popes Head Road with all lanes blocked, Havenner Road closed near Youngs Branch Drive and Fairfax Station Road shut between Colchester Road and Innisvale Drive. Piney Branch is one of the main streams of the Popes Head Creek watershed, which drains to the Occoquan. When those creeks run that high, the slope above a daylight basement is soaked too, and its water heads for the pit. Watch the pump bring it down, then call us to check the rest.
How much does sump pump replacement cost in Fairfax Station?
$697 installed in your existing pit: a new cast iron pump, a quiet check valve, new PVC to your discharge line, a battery water alarm, the old pump hauled away and a bucket test. A new or deeper pit, discharge line work outside, a battery backup and a dedicated circuit are extra, priced in writing before we start. A new pump and a battery backup installed together are $3,200.
Can I check my sump pump myself?
Yes. Pour five gallons of water into the pit. The float should rise, the pump should start within a few seconds, and it should shut off clean once the water’s down. If you hear water rushing back into the pit after it stops, that’s the check valve.
Sump pump replacement in the towns next door.
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A new pump before the next storm.
Call, or book online and pick a window. Often same-day, and we will tell you honestly when we can get there.
SwiftPro Heating, Cooling & Plumbing is a licensed, BBB Accredited (A rating), independently owned heating, cooling and plumbing company in Chantilly, serving Fairfax Station 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.