When an Alexandria water heater starts leaking from the tank or can no longer keep up, replacing it is usually smarter than another repair. Inside city limits the City's Department of Code Administration handles permits, including fuel gas permits, while Alexandria-addressed homes in unincorporated Fairfax County go to Fairfax County instead. Call the number on this page to be connected with a local plumber in Alexandria.
Alexandria conditions that shape the job
Inside the city, Virginia American Water delivers water it buys from Fairfax Water, drawn from the Potomac River and the Occoquan Reservoir. Its annual report gives total hardness from 78 to 191 ppm, a spread that lands in moderately hard to hard territory, so scale and tank sediment are a normal part of a heater's life here. Many Alexandria-addressed homes outside the city, in ZIP codes such as 22306 through 22312 and 22315, are generally on Fairfax Water directly.
The housing is a wide mix. The city's median home dates to 1974, but Old Town has 18th- and 19th-century buildings where heaters sit in cramped basements or under stairs, and the West End and Potomac Yard lean toward condos and newer townhouses. Washington Gas serves the area. A gas smell means leave first, then call 911 and Washington Gas at 844-WASHGAS (844-927-4427), option 1.
Comparing your replacement choices
| Option | Fits best when | Points to weigh |
|---|---|---|
| Same tank, same fuel | The old heater kept up fine | Quickest swap; still needs the right permit |
| Larger tank | More people or a bigger tub than before | Basement doorways and venting capacity in older homes |
| Tankless gas | Space is tight and demand is steady | Gas line sizing, new venting, periodic descaling |
| Heat pump electric | All-electric homes with a roomy utility area | Needs air volume around it; not ideal for small closets |
Signs to act on
- A slow drip or damp floor under the tank
- Discolored hot water or a metallic taste on the hot side
- Popping sounds while the burner runs
- Hot water that runs out partway through a shower
Timing and the seasons
Winter is when a tired heater gives up. Incoming water is colder, so the unit works harder for every gallon, and a tank that was limping along in summer may stop keeping up in January. Replacing on your schedule, in spring or fall, gives time to compare a straight swap with an upgrade. If the basement takes on water in heavy summer storms, raising the new heater on a stand or adding a drain pan routed to a floor drain is worth asking about. The City also offers a reimbursement for backflow preventers on sewer laterals, which can matter to basement owners near combined sewer areas of Old Town.
Water Heater Replacement questions in Alexandria
Does replacing a water heater here need a permit?
How do I find out who supplies my water?
How hard is the local water, and what does it do to a new tank?
The old heater leaked in the basement. What should I check?
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