Slab Leak Repair in Rockville, MD

Who do I call if water is coming up outside?

That depends on your water provider. The City of Rockville runs its own system for about 70 percent of the city, drawing from the Potomac River and treating the water at its own plant, while WSSC Water serves the rest. The City's Water Service Provider Map and your water bill both show which one you have. For a main break or leak in the street on City water, the City's 24-hour line is 240-314-8567. On WSSC water, use WSSC's Emergency Service Center at 301-206-4002. If the meter is spinning but nothing shows outdoors, the leak is almost always on the house side, and that is work for a plumber.

Is my Rockville house likely to have pipes under the floor?

Rockville's median home was built around 1980, a mix of postwar subdivisions such as Twinbrook and newer construction near Town Center and along Rockville Pike. Older ranch and split-level houses often have a stretch of supply pipe under a basement or lower-level slab, and townhouses commonly run lines beneath the ground floor. Copper from those decades can pinhole or wear thin where it presses against stone, and any line can be punctured during a later remodel. A plumber who isolates the hot and cold sides and pressure-tests them can tell quickly whether the leak is under concrete or somewhere easier to reach.

Which office issues the permit?

Again, it follows the water provider. Addresses on City water go to the City of Rockville's Department of Community Planning and Development Services for plumbing permits, while WSSC-water addresses get them from WSSC Water Permit Services. A plumber doing slab work in Rockville will confirm the right office once the address is known. Larger jobs, such as a reroute or a partial repipe, are the ones most likely to need a permit and inspection.

A Rockville note

While a leak is active, close the main shutoff where the service line enters the house and leave it closed until the plumber arrives. City water is disinfected with chlorine at the plant, and the City buys Potomac-sourced water from WSSC when its own plant is offline. Neither detail changes how a leak under the floor is located or repaired.