Tankless Water Heater in Chevy Chase, MD

Signs it's time to think tankless

• The water heater is old and sits in a cramped basement corner
• Hot water runs out when the household gets ready at the same time
• A renovation is opening walls near the utility area
• An existing tankless unit loses flow or shows error codes

Local conditions in Chevy Chase

Chevy Chase grew as an 1890s streetcar suburb along Connecticut Avenue. In ZIP 20815 about two-thirds of homes were built before 1980, and over 2,600 date from 1939 or earlier. Homes of that age often have a masonry chimney shared by the boiler or furnace and the water heater, gas piping laid out long before high-input appliances, and electrical panels that have been upgraded piecemeal. Each of those affects a tankless install.

Chevy Chase is also a patchwork: an unincorporated area plus several incorporated towns and villages. WSSC Water issues plumbing and fuel gas permits throughout, and only WSSC-registered master plumbers or gasfitters can apply. Montgomery County handles building permits. In the Town of Chevy Chase, larger projects need a Town permit as well, and the Town won't approve it until the County permit is issued. A heater swap alone may not trigger that, but a tankless install folded into a basement remodel could. Other villages have their own rules, so check with yours.

What affects the cost

• Vent path. A direct-vent unit needs a route to the outside; in a tight older basement that can take some work.
• Chimney. The furnace or boiler left in the old flue may need a liner.
• Gas supply. Older piping often needs upsizing for a tankless burner.
• Recirculation. Large older homes with distant baths benefit from a loop or pump.
• Permits. WSSC for plumbing and gas; town approval where it applies.

What happens when you call

The number connects you with an independent plumber who works in Chevy Chase. Tell them whether your address is inside one of the incorporated towns or villages, describe the current heater and venting, and mention any remodel plans. The plumber will usually inspect the chimney, gas line and panel before giving a firm price. If you smell gas, leave the house first, then call 911 and Washington Gas at 844-WASHGAS (844-927-4427), option 1.