Leak Detection in Mount Rainier, MD

Old houses, hidden leaks

Mount Rainier began as an early-1900s streetcar suburb on the District line, bordering Woodridge in Washington, and much of the city is a National Register historic district full of Sears kit houses and Craftsman homes. The median home here dates to 1952. Houses that old are likely to have galvanized steel supply pipe, cast iron drains and older sewer laterals, often mixed with copper or plastic from later repairs. Galvanized pipe corrodes from the inside, which leads to pinhole leaks, rusty water and dropping pressure, and the joints between old and new materials are common failure points.

WSSC Water provides water and sewer service; the city does not run its own water system. Report water in the street or at the curb to WSSC at 301-206-4002. WSSC also offers a lookup map that shows whether your service line is listed as lead, galvanized requiring replacement, or unknown.

Spot repair or replacement?

Signs to watch

• Rust-tinted water or dropping pressure at faucets
• Cracked or stained plaster below a bathroom
• A meter that moves with nothing running
• Damp spots in the basement near the main line
• Water spots on the ceiling below an upstairs bathroom or laundry

Timing and seasonal notes

Older homes with pipes in exterior walls are vulnerable in hard freezes; check the meter after a cold snap. Many leaks in galvanized pipe get worse slowly, so if you notice rusty water or falling pressure, it pays to have the system checked before a pinhole becomes a burst. In a historic house, ask the plumber how any opening in plaster or trim will be patched, and whether a pipe can be reached from the basement or a closet instead of a finished wall. Plumbing work needs a WSSC Water permit, and the city's Code Compliance office handles city building permits.