Open 24/7 for emergencies
Sump pump replacement in Sterling: $697 installed in your existing pit. A new pit, a battery backup, outside drain work or new wiring is extra.
Get your price in writing
Send this and the office calls or texts you back to set a time.
We’ll call or text this number about your request. By sending it you agree to our terms and privacy policy.
Rather talk now? (703) 997-9757
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 Sterling
Loudoun Water asks that no sump pump drain into the sanitary sewer, and in Sterling its own budget shows why. Its capital plan lines every lateral in the Cabin Branch sewershed, part of Sterling Park, partly to keep storm rain out, and lines mains and laterals in the sewershed it calls Countryside 2 for the same reason. A pump emptying into a laundry tub adds to that water, and in a big storm, Loudoun Water says, it can push sewage back up into houses.
Older basements are where that tie-in hides. About four in ten homes in the Census’s Sterling, the part south of Route 7, went up before 1980, and nearly as many in Sugarland Run. In a basement that age the pit may have come years after the house, piped to whatever drain was handiest. A replacement is the time to follow that pipe to where it really ends; if it’s the sewer, moving it outside is discharge line work, priced in writing before we start.
Loudoun County maps shrink-swell soils across eastern Loudoun, where Sterling sits: clay that swells as it takes on water and shrinks as it dries, pressing unevenly on foundations. Clay gives water up slowly, so after a long rain the ground against a basement wall can stay wet long after the sky clears, feeding the pit through the foundation drain. Empty the pump right beside the house and that water soaks back down for a second trip.
Not every Sterling home has a pit. About four homes in ten here are detached houses and a third are townhouses, while about 15 in 100 are in condo or apartment buildings, where an upper-floor home has none. Oak Grove’s typical owner home dates from 2005, so an original pump there is long past its years.
Neighborhood by neighborhood
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 |
|---|---|---|---|---|
| Sterling | 1979 | single-family houses, about 5 in 10 | electricity, about 5 in 10 | Older basements: check where the sump line empties. |
| Lowes Island | 1996 | single-family houses, about 6 in 10 | gas, about 7 in 10 | 1980s and 90s basements: an original pump is long overdue. |
| Cascades | 1996 | townhouses, about 4 in 10 | gas, about 8 in 10 | 1980s and 90s basements: an original pump is long overdue. |
| Sugarland Run | 1983 | single-family houses, about 6 in 10 | gas, about 5 in 10 | 1980s and 90s basements: an original pump is long overdue. |
| Dulles Town Center | 1998 | condo and apartment buildings, about 5 in 10 | gas, about 9 in 10 | Condo buildings: shared pits are the association’s to look after. |
| Arcola | 2017 | townhouses, about 5 in 10 | gas, about 8 in 10 | Newer basements: the pump may still be the builder’s. |
| Oak Grove | 2005 | townhouses, about 8 in 10 | gas, about 9 in 10 | Newer basements: the pump may still be the builder’s. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
When it’s time
Some of that is the clay letting go of its water. A pump still kicking on every few minutes a week later is usually moving its own water twice: from a discharge that ends too close to the wall, or back through a check valve that no longer holds.
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.
In Sterling the right answer is the yard. A quote that never asks may set a new pump on an old tie-in to a laundry tub. Ask them to trace the pipe, and to put any outside line work in writing first.
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 Sterling: Ashburn, Herndon, Reston, Great Falls and Chantilly.
Questions
The U.S. EPA requires it to keep clear water out of the sanitary sewer, and the plumbing code Loudoun County enforces says storm water shall not be drained into sewers meant for sewage only. Clear water that reaches the treatment plant gets treated for nothing, which raises the cost.
Not for age alone, if it passes the bucket test. Arcola’s typical owner home dates from 2017, inside the seven to ten years pump makers give a pump. If it hums without pumping, cycles fast or runs with nothing coming in, it’s time, and a replacement is $697 installed.
Some nights. In July 2013 NOAA’s storm records count up to seven inches in under six hours near Dulles Airport, and a water rescue on Relocation Drive. On August 12, 2020, Cabin Branch came out of its banks over West Church Road and stranded a car. Thomas Avenue went under where it crosses Sugarland Run three times between January 2013 and May 2014, the last time with a driver rescued from a stranded car. FEMA maps a 100-year flood zone along both streams. During rain like that, watch the pit: the pump should keep emptying it and shutting off. If it fell behind or the floor got wet, call us after the storm and we’ll check it all, the pump, the check valve and where the line ends. One that can’t keep up is replaced for $697, installed.
$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 Sterling 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.