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Sump pump replacement in Manassas: $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 Manassas
The Census doesn’t count basements, so nobody can honestly say how many Manassas homes have a sump pit, and plenty don’t: half of Bull Run’s homes are in condo and apartment buildings, where an upstairs unit has no pit. Where there is a basement, the pit at its low point takes whatever the footing drain collects, so how hard the pump works depends mostly on the ground under the house.
Prince William County’s soil map covers the City too, and across one Manassas address it runs from easy ground to hard. About seven tenths of Bull Run is the county’s Category III, problem soils, a class that includes floodplain and a year-round high water table, and two thirds is hydrologic group D, which the USDA says takes water very slowly once wet. More than a third of Buckhall and over half of Independent Hill is Category I, the county’s good soils, mostly in group B, which drains moderately.
Inside the City the map puts about three quarters in Category II, potential problem soils, a list that starts with high groundwater, and the rest in Category III. Loch Lomond barely registers: close to nine tenths of it is mapped as urban land, ground already built on when the survey was made, which the county says the survey didn’t study. In a 1968 Loch Lomond basement the pit is the better record. How fast it refills after a soaking rain, and for how many days, tells you about your ground.
On the county side, Prince William Water lists sump pumps among the wrong connections that cause sewer overflows, and leaves repairing or replacing one to the owner. A Sudley or Yorkshire pump that empties into a laundry tub or a floor drain gets piped outside instead: discharge line work, priced in writing before we start.
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 |
|---|---|---|---|---|
| City of Manassas | 1985 | single-family houses, about 4 in 10 | electricity, about 5 in 10 | 1980s and 90s basements: an original pump is long overdue. |
| Buckhall | 1995 | single-family houses, about 8 in 10 | electricity, about 5 in 10 | 1980s and 90s basements: an original pump is long overdue. |
| Sudley | 1977 | townhouses, about 4 in 10 | gas, about 6 in 10 | Older basements: check where the sump line empties. |
| Independent Hill | 2000 | single-family houses, nearly all | gas, about 6 in 10 | Newer basements: the pump may still be the builder’s. |
| Bull Run | 1995 | condo and apartment buildings, about 5 in 10 | gas, about 7 in 10 | Condo buildings: shared pits are the association’s to look after. |
| Yorkshire | 1984 | single-family houses, about 4 in 10 | gas, about 5 in 10 | 1980s and 90s basements: an original pump is long overdue. |
| Loch Lomond | 1968 | single-family houses, nearly all | gas, about 7 in 10 | Older basements: check where the sump line empties. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
The whole City sits in ZIP 20110. It runs its own water, sewer and electric service.
Sudley and Bull Run in 20109, Yorkshire and most of Buckhall in 20111, Independent Hill in 20112, plus the county edges of 20110.
When it’s time
On slow-draining ground like much of Bull Run, water keeps reaching the pit long after the rain stops, so a pump that runs for a couple of days isn’t necessarily failing. It does work harder than one in better-drained Buckhall, and more cycles wear a pump out sooner.
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.
How often it runs, and for how long once the rain stops, tells a plumber whether a standard pump in your existing pit is enough or whether a battery backup is worth adding. A quote given without asking prices a pump, not your basement.
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.
Excellent service and attention to detail. James was super thorough and explained everything to me. I highly recommend them for any plumbing needs
Replaced 2 sump pumps. Very professional, proficient, and courteous.
Where we work
Next door to Manassas: Bristow, Nokesville, Clifton, Centreville and Catharpin.
Questions
No. The City Code bars any sump pump from discharging into a city sewer, and footer drains, downspouts and area drains too. If yours runs to a floor drain or the laundry tub now, piping it outside is extra work, priced in writing first.
Usually not. Virginia’s landlord law has the landlord keep the plumbing and the appliances he supplies in good, safe working order, and two in three Bull Run homes and about half of Yorkshire’s are rented. Tell the owner or the management company it’s failing before the next storm, not during it.
It has. When Bull Run crested at 20.2 feet at its Manassas Park gauge on July 22, 2018, eight feet over flood stage, the National Weather Service reported water running overland into two basements along Lake Drive. Smaller crests from 2018 into 2021 left water standing in Yorkshire backyards again and again. No sump pump holds back a river crossing the yard, but once the water drops, soaked ground keeps feeding the pit, and that’s when a tired pump falls behind.
$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 Manassas 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.