Leak Detection in Montgomery Village, MD

Why do Montgomery Village homes develop hidden leaks?

The community was laid out by Kettler Brothers in villages around Lake Whetstone, and roughly half of the homes in ZIP 20886 were built before 1980, with the 1970s the busiest decade. Plumbing from that era has had decades of pressure cycles, temperature swings and mineral buildup. Original shutoff valves stop sealing, supply connectors stiffen and crack, and copper joints can start to weep. Townhouses and condos here share walls and floors, so a leak in one unit often shows up as a stain in the next.

How do I know whether the leak is inside or outside?

Start with the meter. Turn off all fixtures and appliances and watch the leak indicator; if it moves, water is going somewhere. Close the main shutoff inside the house. If the meter stops, the leak is in the home's plumbing. If it keeps turning, the trouble is likely on the buried line from the meter to the house. Water bubbling up near the meter or in the road should be reported to WSSC Water at 301-206-4002, since the break may be on the utility side.

What if the leak is in a shared wall or the unit above?

Note where the water appears and when. A stain that grows only when a neighbor showers points to a drain or shower valve above; one that stays wet all the time suggests a pressurized supply line. Many attached homes here are governed by HOAs or condo associations, so check who is responsible for pipes in shared walls before work starts. A plumber can use moisture meters and thermal imaging to show where the water is coming from, which helps everyone agree on the fix.

Once the source is found, most plumbing work in Montgomery County, including service line repairs, has to be done by a plumber holding a WSSC Water license under a WSSC permit.

A note on older service lines

WSSC Water says it removed all known lead pipe from its distribution system in the early 2000s and adds orthophosphate to reduce corrosion in home plumbing. Its online service line inventory map shows what material is on record for an address, which is worth checking if your home is one of the earliest in the Village and the service line needs work.