Water Heater Replacement in Rockville, MD

Who issues my water heater permit in Rockville?

Rockville is split between two water systems, and the permit follows the water. The City of Rockville serves about 70 percent of the city; WSSC Water serves the rest. The City's Express Water Heater Permit Guide says City-water addresses apply to Community Planning and Development Services online through MGO Connect, while WSSC-water addresses get the permit from WSSC Permit Services (301-206-4003). If you aren't sure which side of the line you're on, the City publishes a Water Service Provider Map, and your water bill will say. A plumber who works in Rockville regularly will usually know, but it is worth confirming the quote names the right office.

Who supplies my water, and who do I call in an emergency?

City water comes from the Potomac River, treated at Rockville's own plant and disinfected with chlorine; the City buys WSSC water, also Potomac-sourced, when its plant is offline. For a main break or sewer backup on City water, Rockville's emergency line is 240-314-8567. WSSC-served homes call the WSSC Emergency Service Center at 301-206-4002. Neither number is needed for a leaking heater: closing the cold valve above the tank, or the house main, stops that.

What should I expect from a Rockville home of this age?

The median Rockville home was built around 1980, and the city mixes postwar subdivisions such as Twinbrook with newer construction near Town Center. In the older houses the heater often sits in a basement or utility room with a vent and gas connector from an earlier install, so the plumber may need to update the vent connector, add an expansion tank or reroute the relief line to meet current code. Newer homes tend to be simpler swaps. Either way, ask for a quote that lists the model, the permit and any code corrections so two offers can be compared fairly.

If the household has grown since the last heater went in, consider a larger tank or a tankless unit rather than a straight match. Tankless gas units often need a larger gas line, which adds to the job.

One local note on gas

Washington Gas is the gas utility named for Rockville. If you smell gas near the heater, leave the house first, then call 911 and Washington Gas at 844-WASHGAS (927-4427), option 1, from outside. Don't flip switches or try to relight anything on the way out.