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Sump pump replacement in Haymarket: $697 installed in your existing pit. A new pit, a battery backup, outside drain work or new wiring is extra.
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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 Haymarket
Start with whether you have a pit at all. The Census counts how old Haymarket’s houses are and what kind, not how many have a basement: across 20169 about three homes in four are single-family houses and close to a quarter are townhouses, and some of each have a lower level set into the ground while others sit on a slab. Look in the lowest floor’s utility room for a covered hole in the concrete with a pipe climbing the wall.
The Town’s annex to the Northern Virginia Hazard Mitigation Plan ranks flooding and flash flooding as a high risk, alongside severe storms and winter weather, and it lists July 2018, when 5.02 inches of rain fell in 24 hours, as a significant event. The National Weather Service’s storm reports add others: in May 2012 a spotter near Thoroughfare measured 4.43 inches the day flash flooding closed Old Carolina Road, and on December 18, 2023, high water along Little Bull Run and the streams feeding it closed Logmill Road, Artemus Road and Pageland Lane. A day like that is the test an old pump fails.
Pump age follows the house. Inside the Town the median owner home is from 1995, so a pit that came with the house has likely seen two or three pumps already. Across the whole ZIP the median is 2006, and about three homes in ten went up in 2010 or later, so plenty of Dominion Valley and Piedmont basements still run the builder’s pump, well past due at fifteen to twenty years.
Where the water goes counts too. Prince William Water names sump pumps, downspouts and foundation drains connected to the sewer among the causes of sewer overflows. So when the old pump comes out, follow its pipe: it should leave through a wall to the yard, not end in the basement floor drain or the washer’s standpipe. On Bull Run Mountain, where about six in ten houses predate 1980, a pit dug years after the house went up is where a pipe gone the wrong way tends to hide.
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 |
|---|---|---|---|---|
| Bull Run Mountain Estates | 1978 | single-family houses, nearly all | electricity, about 4 in 10 | Older basements: check where the sump line empties. |
| Haymarket | 1995 | single-family houses, about 6 in 10 | gas, about 6 in 10 | 1980s and 90s basements: an original pump is long overdue. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
Inside the town limits only, about one in eighteen of the owner homes with Haymarket mail. Dominion Valley, Piedmont and Bull Run Mountain Estates sit outside it, in the county.
ZIP 20169 as a whole: every Haymarket address, the Town’s homes included.
When it’s time
The Town ranks severe storms as a high risk too, and a plug-in pump quits the instant the power does, right when the pit fills fastest. If your street goes dark a few times a year, price a battery backup with the new pump.
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 a finished basement the pump often shares a circuit with a freezer or a dehumidifier, and a tripped breaker takes the pump down with it. Ask whether yours is on its own; if not, a dedicated circuit is an extra, priced 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 Haymarket: Gainesville, Catharpin, Broad Run, The Plains and Aldie.
Questions
Yours. Prince William Water says the property owner is responsible for repairing or replacing a sump pump, inside the Town and on the county side alike; it only helps look into a pump it installed itself. A new pump in the pit you already have is $697 installed.
Not for the pump. The Town’s Architectural Review Board looks at changes the public can see, and its guidelines exempt interior work. Running a new discharge pipe out through a wall that faces the street is a visible change, though, so check with the Town before that part goes in.
$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 Haymarket 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.