Housing around Fairfax is older than much of the county, with a median build year of 1967, so plenty of homes still run on galvanized or first-generation copper supply lines. A repipe replaces that pipe before the next leak becomes a ceiling repair. Call the number on this page to be connected with a local plumber in Fairfax.
A quick local picture
The City of Fairfax is a small independent city and the county seat, with a redeveloped Old Town core surrounded by suburban neighborhoods and George Mason University just to the south. Most of the 22030 to 22033 ZIP area outside city limits is unincorporated Fairfax County. Fairfax Water supplies both, and it owns the service line up to and including the meter; the line after the meter is the customer's.
What to do now
- Confirm city or county. Your tax bill or the City's address lookup tells you whether you're inside city limits. That decides who issues the permit.
- Find the main shutoff. Test it now; old gate valves often stick or leak when finally turned.
- Look at the pipe. Gray threaded pipe means galvanized; reddish-brown is copper; gray or white plastic may be polybutylene or newer material.
- Track the leaks. Write down each location and date to show whether failures are spreading.
- Check the morning water. Rusty color that clears after a minute points to corroding steel lines.
- Plan the household. Expect several days of daytime shutoffs, with water back on most evenings.
Symptoms and what they usually mean
| Symptom | Likely cause |
|---|---|
| Rusty water first thing in the morning | Corroding galvanized supply pipe |
| Weak flow at every fixture | Scale and rust narrowing old lines, or the service line |
| Pinhole leaks in different rooms | Aging copper wearing thin |
| Valves that won't shut off | Corroded or scaled valve seats |
| Leak near the water heater | Corroded nipples or connectors at old fittings |
What affects the cost
- House size and number of bathrooms
- Plaster or drywall, and how much opening is needed
- PEX, copper or a mix
- Whether the owner's buried line from the meter is included
- Permit path: inside the city, plumbing permit applications go to the City's Code Administration office on Armstrong Street; county addresses apply through Fairfax County's PLUS system
- New shutoff valves and water heater connections
Older homes often hide surprises, such as a stretch of steel pipe left behind during an earlier copper repair or a valve buried in a finished wall. A careful scope traces every run back to the main so nothing old is left connected, and it lists which fixtures, hose bibs and appliances will be tied into the new system.
Repiping questions in Fairfax
My mailing address uses the town's name, but I live outside its limits. Whose rules apply?
What kind of supply pipe is a house of this age likely to have?
Who owns the water line between the meter and the house?
How much wall and ceiling has to be opened?
More plumbing services in Fairfax
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