Chantilly homes, mostly from the 1980s and later, often have a basement sump pump that has been running for years without much attention. When it fails, the usual causes are a stuck float, a failed check valve, a power problem or a worn motor. Call the number on this page to be connected with a local plumber in Chantilly.
How old is my Chantilly pump, and how long will it last?
Chantilly is an outer suburb in western Fairfax County, centered on the Route 50 and Route 28 interchange, and its median home was built in 1987. Neighborhoods like Franklin Farm and Greenbriar are old enough that many original pumps have already been replaced once, and the replacements are aging too. There is no fixed lifespan: a pump in a pit that runs all spring wears much faster than one that sees water a few times a year. Signs it is near the end include loud running, overheating, cycling without emptying the pit, or rust on the housing. A plumber can test it and tell you whether a repair is worth doing.
What if sewage, not rainwater, comes up in the basement?
That points to the sewer lateral or a sewage ejector rather than the sump. Chantilly is unincorporated Fairfax County, and the County's Wastewater Management Program runs the public sewer. If sewage backs up with no fixtures running, the County asks you to call its 24-hour line, 703-323-1211, first. If the main is clear, the private lateral between the house and the main is the owner's responsibility. Sump water should never be pumped into that sewer line.
Do I need a permit, and what about a water-powered backup?
Fairfax County Land Development Services requires permits for new, repaired or relocated plumbing fixtures, with an exemption for like-for-like replacement in the same location. Swapping a pump is usually simpler than adding an ejector system or new drain piping, which may need a permit. A water-powered backup uses Fairfax Water's supply, and the County's cross-connection program requires testable backflow assemblies to be tested at installation and every year by an authorized certified tester. For most homes, a battery backup is the easier route.
Local note
For a water main break or an after-hours water emergency, Fairfax Water's line is 703-698-5613. That number is for the public water system; groundwater in your sump pit is a plumbing job. If you are not sure which side of the line a problem sits on, a plumber can trace it and tell you whether it belongs to you or to the utility.
Sump Pumps questions in Chantilly
Should I repair the old pump or replace it?
Sewage is coming up through a basement drain. Who do I call first?
Is a battery backup pump worth adding?
Why does the sump pit smell?
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