Sump pump replacement in Dunn Loring.
Sump pump replacement in Dunn Loring: $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
Dunn Loring sits on high ground, with a water table two feet down in places.
Dunn Loring is basement country. Of the 742 houses Fairfax County’s tax records list with a 22027 address, about nine in ten have a full basement, half are daylight basements, and 617 have a finished rec room down there. When a pump quits, the water reaches carpet and drywall well before anybody upstairs hears a thing.
The ZIP sits up on the Piedmont, about 430 feet above sea level at the USGS’s Dunn Loring point, which sounds like dry ground. The soil says otherwise. Fairfax County’s soil map puts about half the land in 22027 on soils whose seasonal high water table can rise to within two feet of the surface: Sumerduck along the drainageways, and Beltsville, with a dense layer two feet down that water pools on. For both, the county’s soils guide calls for foundation drains and waterproofing to keep a basement dry.
The rain comes in bursts. Vienna’s weather station, 3.6 miles west, averages about 43.6 inches of precipitation a year, and on September 30, 2010, a gauge near I-66 at Vienna caught 4.80 inches. On July 8, 2019, the National Weather Service logged a flash flood under the Dunn Loring name. Those are the days a pit fills faster than a tired pump can empty it.
Then the power. Tropical Storm Irene left about 81,000 outages across Fairfax County in 2011. Dunn Loring is unincorporated county, so the Flood Mitigation Assistance Program can return half of what a battery backup cost you; it leaves out the Town of Vienna, the Town of Herndon or the City of Fairfax. Vienna mail is common here, so check the property in the county’s Master Address Repository first, and keep the itemized invoice and a photo of the finished install: the program asks for both.
Dunn Loring houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
Dunn Loring
ZIP 22027 as a whole: every Dunn Loring address. The Dunn Loring Census place is bigger: about three in four of its homes have Vienna mail.
- Median home built1991 Census
- Built before 1980about 3 in 10 Census
- Built since 2000about 2 in 10 Census
- Most homes aresingle-family houses, about 9 in 10 Census
- Heated withgas, about 7 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 Dunn Loring.
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 Dunn Loring needs replacing.
The rec room carpet is damp along one wall
In a finished basement that’s often how a failed pump shows itself, because the pit is boxed in behind a closet door and nobody hears it stop. A full pit and a silent pump point at the pump, its float or its power.
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 Dunn Loring, 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 Dunn Loring.
Questions to ask anybody who quotes you, us included.
Did they watch how fast the pit refills?
A pit that fills again within minutes after rain is a different case from one that barely moves. Ask the plumber to time it; on wet soil that number decides whether a battery backup earns its place.
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.
Tech was super knowledgeable, polite, communicative, and kind. I highly recommend this great company who prioritized my request to review my sump pump and other related needs
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Sump pump questions from Dunn Loring.
How do I know if my Dunn Loring lot sits on wet soil?
Look up your address on Fairfax County’s online soil map; every soil on it carries a depth to its seasonal high water table. Sumerduck, Beltsville, Codorus or Hatboro means water close to the surface for part of the year, and a sound pump with a battery backup is worth having.
Where should my sump line empty in Dunn Loring?
Somewhere the water keeps moving. Much of 22027 is compacted fill that soaks water in slowly, so a discharge ending a foot from the foundation tends to come back to the pit. Run it to ground that slopes away from the house, on your own lot, and never into a sewer cleanout: Fairfax County’s sewer diagram calls a sump piped into the lateral an improper connection.
How much does sump pump replacement cost in Dunn Loring?
$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.
More from SwiftPro in Dunn Loring.
More from SwiftPro in Dunn Loring
A new pump before the next storm.
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SwiftPro Heating, Cooling & Plumbing is a licensed, BBB Accredited (A rating), independently owned heating, cooling and plumbing company in Chantilly, serving Dunn Loring 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.