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Sump pump replacement is $697 installed in your existing pit, with a new cast iron pump and a quiet check valve.
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Sump pump replacement off post at Fort Belvoir: Cook Inlet’s basements sit on clay. On post, The Villages at Belvoir handles its homes. A new or deeper pit, a battery backup, discharge line work outside and a dedicated circuit are extra, priced in writing before we start.
5.0 stars across 1,132 reviews
Two of our technicians in a basement mechanical room, beside the furnace and a gas water heater.
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 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
or $53/mo at 0% APR for 60 months
A new or deeper pit, discharge line work outside, or a dedicated circuit
Priced in writing before we start
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
$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.
What’s different in Fort Belvoir
Most off-post homes with Fort Belvoir mail are Cook Inlet’s 256, 148 detached and 108 townhouses, finished from 2002 to 2004 over full basements. Fairfax County’s soil map puts the neighborhood on clay in the slowest-draining hydrologic group, with the water table as close as two feet to the surface. Rain that can’t soak down travels along the foundation to the footing drain, and from there to the pit. If your pump is still the one from 2003, it has worked that clay for more than twenty wet seasons.
A creek over its banks isn’t the usual threat. FEMA’s flood map puts Cook Inlet and the Backlick Road houses in Zone X, minimal flood hazard, and the USGS puts Cook Inlet about 120 feet above sea level, while the post’s own reference point reads 8.5 feet beside the tidal Potomac. What reaches a Cook Inlet basement is groundwater after a hard rain, like June 28, 2016, when the Weather Service logged Route 1 flooded and closed at Belvoir Court. Reagan National, about 13 miles up the river, averages around 42 inches of rain a year.
Backlick Road in Accotink is older ground with older houses. Fairfax County dates them from 1900 to 2010, mostly to 1925 or 1978, and about half have no basement. In one that does, the pit may have been cut into the floor decades after the walls went up, with its discharge line run wherever was easiest. Replacing the pump there starts with looking down the hole: how deep the pit is, and whether the line out still falls away from the house.
Storms here arrive with wind. Hurricane Sandy gusted 58 to 63 mph at Fort Belvoir in October 2012, with sixty Fairfax houses damaged by falling trees, and a 66 mph gust was measured at Davison Army Airfield on May 30, 2019. A pump on house current stops when the lines do, and the thunderstorm that takes the lines is also the one that fills the pit. A battery backup carries the pump through, and it’s an extra beside the pump itself.
When it’s time
Cook Inlet’s clay drains slowly and the county’s soil survey has the water table as close as two feet down, so water lingers against a foundation after the sky clears. A pump that keeps up empties the pit and the strip dries. If the strip stays and the pump is the 2003 original, plan the replacement now rather than in the next storm.
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.
Water is running back into the pit through a check valve that no longer closes, so the pump moves the same water again and again until it wears out.
After a heavy rain
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.
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.
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.
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.
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.
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.
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.
Choosing who replaces it
Questions to ask anybody who quotes you, us included.
On Cook Inlet clay, an outlet dumping beside the foundation sends the same water straight back toward the pit. The pipe should carry it well out, over ground that slopes away. Reagan National logs about 60 freezing nights a year, so a pipe that stays full can freeze solid and leave the pump nowhere to push. A longer run outside the house changes the quote, and the quote should say so before work begins.
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.
Cast iron, ideally. Plastic pumps cost less and are usually the ones that quit early. Ask before the old one comes out.
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.
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.
Replaced 2 sump pumps. Very professional, proficient, and courteous.
Where we work
Next door to Fort Belvoir: Lorton, Springfield, Alexandria, Woodbridge and Fairfax Station.
Questions
Not in family housing on post. The Villages at Belvoir, the Army’s privatized housing partner, runs those homes, and its residents put in a service request with The Villages, whose offices are on post. Off post, in Cook Inlet or on Backlick Road, a sump pump is ours to replace.
Usually the owner’s, so start with your landlord or property manager. The 2020 Census found 83 of Cook Inlet’s 256 occupied homes rented, about a third, and in ZIP 22060 as a whole about nine in ten occupied homes are rented. Write down the dates the water showed up and where along the wall; it gives the owner something to act on.
$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.
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.
Ready when you are
Call, or send the form at the top. Often same-day, and we will tell you honestly when we can get there.
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 Fort Belvoir 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.