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Sump pump replacement in Catharpin. $697 covers the pump. Extras like a new pit, discharge line, battery backup, or dedicated circuit cost more.
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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 Catharpin
Catharpin sits in a low Triassic basin between Manassas and the Bull Run Mountains. Little Bull Run floods Artemus Road and Pageland Lane often enough to have its own NWS flood gauge. In July 2025, the gauge recorded its highest crest at 7.88 feet. That water moves fast and finds low spots. If your home has a basement or crawlspace, the sump pit is the first line of defense against that runoff. A pump that has run through many of these events is working hard. Replacing it before the next storm season is smarter than waiting for it to fail during one.
The median owner home in ZIP 20143 was built in 1986, and 42.1% of homes date from before 1980. These older structures often have original sump pumps that have cycled for decades. The local soil is described as having purplish characteristics in the basin area. Water drains through this ground into the pit. A pump cycling frequently after rain is likely handling the inflow, not failing. However, if the motor is worn or the float is stuck, it may not start when you need it most. Check the date on your current pump if you can find it to gauge its remaining life.
Prince William Water supplies your home. The utility rates this system as moderately hard, with 2025 entry-point tests showing 44 to 180 mg/L. That mineral content can affect the check valve and the impeller over time. Sediment from the basin soil also settles in the pit. A new cast iron pump handles that grit better than older plastic models. When we replace it, we clean the pit and check the discharge line. If the line goes into a floor drain or laundry sink, that is an improper connection. We will point out where it ends so you know if it needs rerouting.
Heating in Catharpin is split, with 46% of homes using electricity and 34% using propane. This does not directly change the sump pump, but it tells you the home was built with various utility setups. If your sump pump shares a circuit with other heavy loads, a dedicated circuit is a good upgrade. The battery backup is especially useful here because the gauge shows how quickly Little Bull Run can rise. If the power goes out during a storm, the battery keeps the pump running. We install the pump, the check valve, and the backup if you choose it, all priced in writing before we start.
When it’s time
In the low basin, water lingers in the soil and works its way into the pit. A pump cycling every few minutes is moving that water. If it is old, the constant use wears it out faster. Replacing it before the wet season ensures it is ready for the next crest.
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.
Yes. In Catharpin, tracing the line is important. If it ends at a floor drain or laundry sink, that setup is problematic. We will show you where it terminates and advise if it needs rerouting to drain away from the foundation, ensuring the water leaves the property safely.
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 Catharpin: Gainesville, Haymarket, Centreville, Chantilly and Bristow.
Questions
The low basin and Little Bull Run’s proximity mean more water reaches the pit. The gauge shows how quickly the creek can rise. More water in the pit means more cycles. A new pump handles that load better, and a battery backup protects it during outages.
Prince William County requires a permit for work that alters heating or air conditioning, but sump pump replacement is plumbing. If you are moving the discharge line or adding a new pit, that may fall under plumbing codes. We will tell you if a permit is needed before we start the work.
$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 Catharpin 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.