Leaks reward speed more than any other plumbing problem. A pinhole in a supply line inside a wall can run for months before showing itself — quietly soaking insulation, feeding mold behind baseboards, rotting subfloors. By the time paint bubbles or a ceiling stains, the repair conversation is bigger than the pipe.
Signs you have a leak worth checking
- A water meter that moves with every fixture in the house shut off
- Hot spots on the floor (a classic sign of a hot water line leak under slabs)
- Persistent musty smell in a bathroom or along one wall
- Peeling paint or darkened woodwork at pipe penetrations
- Water bills climbing without any change in usage
- The sound of running water when nothing is on
How we find leaks without demolishing your walls
Guessing is expensive in Manhattan apartments. Opening drywall on speculation means patching and repainting whether or not you guessed right. So we isolate systematically: pressure testing individual supply runs, meter checks to separate supply leaks from drain issues, moisture mapping to follow water back to its entry point, and inspection at the failure points that statistics actually favor — fixture supply connections, valve packing, toilet seals, and the solder joints and threaded fittings common to prewar buildings' original pipework. In many East Village tenements we still find galvanized supply lines decades past their service life; those don't leak once, they leak everywhere, eventually, and it's better to know now.
Fixing it once
The repair depends entirely on what failed: a compression fitting needs reseating, a corroded section gets replaced with copper or PEX matched to the system, a wax ring swap solves the slow toilet-base leak warping the floor beside it. What doesn't change is the standard: the source fixed, the connection tested under pressure, and the surrounding damage documented so you can deal with restoration or insurance with real information.
An active leak you cannot stop by shutting a local valve is an emergency — go to our emergency plumbing page and call. Slow drips under sinks are often tied to aging fixture connections; if the fixture itself is worn out, replacement through our installation team may be cheaper than repeated repairs. And leaks caused by backed-up drains point to drain cleaning as the real fix.