In McLean, a leaking tank or a heater that can't keep up with a large household usually calls for replacement rather than another repair. Fairfax County requires a permit for a water heater replacement, even a direct swap, so build that into the plan. Call the number on this page to be connected with a local plumber in McLean.

What McLean homes bring to the job
McLean sits about nine miles from downtown Washington, with a median home built in 1976 and many larger houses that run more bathrooms than an average suburb. Bigger homes often mean bigger hot water demand, longer pipe runs and, in some cases, two heaters or a recirculation loop, all of which shape the replacement choice.
Water comes from Fairfax Water, either from its own Potomac and Occoquan plants or, for some customers, through the Washington Aqueduct. Testing at the Corbalis plant puts total hardness around 70 to 185 mg/L, averaging about 7.5 grains per gallon. Washington Gas serves the area. If you smell gas, leave first, then call 911 and Washington Gas at 844-WASHGAS (844-927-4427), option 1.
Options side by side
| Option | Good fit when | Trade-offs |
|---|---|---|
| Same-size tank | The current unit meets demand | Simplest swap; Fairfax County permit still needed |
| Larger or second tank | Several bathrooms run at once | Floor space, venting and gas supply |
| Tankless gas | Long showers and steady demand | New gas piping needs a Residential Plumbing permit; descaling with hard water |
| Heat pump electric | A large basement with room for airflow | Higher upfront price; cools the room it sits in |
Signs it's time
- Moisture at the base of the tank or corrosion on the shell
- Hot water that runs out sooner, especially with guests in the house
- Rusty or smelly water from the hot side only
- Repeated repairs on a heater past its first decade
Timing and seasonal notes
The coldest weeks of winter push incoming water temperatures down and expose an undersized or failing heater. If you suspect trouble, replacing in fall avoids a cold-weather scramble. Families planning a kitchen or bath remodel can line up the heater replacement with that work, since new fixtures sometimes change the size you need. And if a recirculation pump is part of the system, ask the plumber to check it at the same visit.
Spring brings its own small quirk: Fairfax Water switches from chloramine to free chlorine generally from April through June, and some people notice the change in taste or smell and wonder whether the heater is the cause. It isn't, and it's no reason to rush a replacement. A better guide is the heater's age and condition. If the label shows a unit well past ten years with any sign of rust at the base, budget for a new one before the next cold season rather than after a leak soaks a finished basement.
Water Heater Replacement questions in McLean
Does replacing a water heater here need a permit?
How do I pick the right size for the new heater?
Does a heat pump water heater work in a basement or utility room?
How do I find out who supplies my water?
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