A pinhole leak loses up to 10,000 gallons per year. Beyond the water bill, persistent moisture causes mold that can cost tens of thousands to remediate. Early detection saves money and your home.
Acoustic listening equipment picks up the specific sound water makes moving through a pressurized pipe — even behind a wall, under a floor, or beneath a slab, that sound is detectable to the right equipment, and it lets us narrow a leak's location down to a small, specific area before opening anything at all. Thermal imaging separately reads temperature differences across a surface, since water — especially from a hot or cold supply line — changes the surface temperature slightly compared to the surrounding dry material, giving us a second data point to confirm what the acoustic reading suggests.
Both methods are non-invasive — the goal is finding the leak precisely enough that repair means opening one section of wall or floor, not guessing and cutting into several. When the source genuinely can't be pinpointed non-invasively, we'll tell you that upfront rather than open up more than necessary.
Slab leaks — under a concrete foundation — are some of the hardest to diagnose without the right equipment, since there's no visible pipe to inspect directly. Wall leaks behind tile, especially around a shower or tub surround, are common in NYC bathrooms and often show up first as a stain on the ceiling below rather than the wall itself. Under-floor leaks near a kitchen or bathroom fixture can travel along a joist before showing a visible sign, which is why the stain location doesn't always match the leak's actual source.
Most leaks turn out to be a single, isolated point of failure — a worn joint, a small pinhole in a supply line, a failed seal — and are fixed completely in one visit once the exact location is confirmed. But detection sometimes reveals something broader: multiple separate leak points along the same line, or pipe that's corroded enough overall that patching one visible spot just means the next failure is already on its way regardless. When that's the case, we'll walk through the difference between a spot repair and a larger fix like partial or full repiping, and what each actually means for your situation.
We price the detection visit and any resulting repair separately and clearly, so there's no pressure to agree to more work than the actual leak requires. If a spot repair genuinely solves it, that's what we recommend — we don't upsell a full repipe when it isn't needed.
Building type changes both the likely leak source and how we approach access. In a co-op or condo, a leak affecting a shared riser or potentially impacting a neighboring unit usually needs coordination with building management before repair work can actually start, even once the leak itself has already been precisely located. In a single-family or two-family home, we typically have full, direct, uninterrupted access without needing that extra coordination step at all.
Older NYC buildings with original, unreplaced supply piping are generally more prone to pinhole leaks from gradual internal corrosion over decades, while newer construction more often sees leaks at fitting connections or appliance hookups rather than the pipe material itself actually failing. Knowing which situation applies helps narrow down where to start looking before equipment is even involved.
We evaluate all visible signs — stains, moisture, pressure drops — and select the right detection tools accordingly.
Acoustic listening devices and thermal imaging locate leaks without opening walls unless absolutely necessary.
Full, honest upfront price for the repair itself before any work begins. No surprises later.
Leak fully repaired, pipe pressure tested, work area left clean and dry. 1-year warranty applied.
No matter where you are in New York City, a licensed NP Co.™ plumber is ready to help.
Available 24/7 across all NYC boroughs — no overtime charges, ever.
Available 24 hours · 7 days · No Overtime · 1-Year Warranty