Alexandria has some of the oldest houses in the region, and a repipe here often means swapping galvanized or tired copper supply lines for new pipe throughout the home. The city's median home dates to 1974, but Old Town and Del Ray hold far older stock. Call the number on this page to be connected with a local plumber in Alexandria.
Alexandria homes and their plumbing
Alexandria grew out of an 18th-century Potomac port. Old Town and close-in neighborhoods such as Del Ray and Rosemont have row houses and older detached homes that can still carry galvanized steel supply pipe, sometimes spliced to copper from later remodels. The West End and Potomac Yard lean toward newer, denser buildings where a repipe is usually tied to a condo association's plans.
Water in the city comes from Virginia American Water, which buys treated water from Fairfax Water. Its report lists total hardness from 78 to 191 ppm, so scale is a real if moderate factor at valves and fittings. Virginia American Water also publishes a service line material map; if your side shows as unknown, you can submit your address and a photo of the pipe. Homeowners are responsible for the plumbing inside the house, which is what a repipe replaces.
PEX or copper in an Alexandria house
| Question | PEX | Copper |
|---|---|---|
| Fishing through plaster walls in an older home | Flexible, fewer openings | Rigid lengths, more access holes |
| Joints hidden in walls | Few, with long continuous runs | More soldered or pressed joints |
| Exposed runs in an unfinished basement | Must be protected from sunlight and damage | Durable where it shows |
| Freezing risk on outside walls | More forgiving if water freezes | Can split when frozen |
| Labor time | Usually shorter | Usually longer |
Many plumbers mix the two: copper where pipe is exposed or near the water heater, PEX for long runs inside finished walls.
Signs it's time
- Leaks showing up in a new spot every few months
- Rust-colored water after the house sits overnight
- A shower that loses force whenever a toilet fills
- Galvanized pipe at the meter or under the kitchen sink
Timing and season
A repipe can be done any time of year, but winter adds a reason not to wait. Old pipe in exterior walls and crawlspaces is the most likely to freeze and burst on the coldest nights, and spring brings a temporary switch from chloramine to free chlorine during Fairfax Water's flushing period, which changes taste but not the pipe itself. Inside city limits, plumbing permits come from the City of Alexandria Department of Code Administration through its APEX system. Alexandria mailing addresses in unincorporated Fairfax County are permitted by Fairfax County instead.
Repiping questions in Alexandria
My mailing address uses the town's name, but I live outside its limits. Whose rules apply?
How can I check what my service line is made of?
PEX or copper: which makes more sense for a repipe?
Does the hardness of the water matter for new pipe?
More plumbing services in Alexandria
Repiping nearby
Sources
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