Leak Detection in New Hampshire, New Jersey & Southern Maine

What a leak detection call actually covers

A leak you can see is a repair. A leak you cannot see is a search, and the search is the part that saves the house. Detection work narrows a stained ceiling, a spinning meter or a jump in the water bill down to one pipe run and one square foot of floor, before anything gets opened up.

That covers pressurized supply lines under slabs and inside walls, hot water recirculation loops, drain and waste lines that only leak when something upstairs runs, hose bibs and irrigation feeds, water heater connections, and the joints behind tub and shower valves. It also covers ruling things out. Half of what a good visit produces is proof of where the water is not coming from, and that proof is what keeps a finished basement ceiling intact.

Signs worth calling about

Water announces itself well before it shows up as a stain. The tells are small and easy to explain away:

• A water bill that climbs with no change in how you live
• The meter dial creeping while every fixture in the house is off
• A warm patch on a floor, which is the classic hot-line slab leak
• A well pump or booster cycling on when nobody is using water
• Hot water that never gets fully hot, or pressure that dropped and stayed down
• A musty smell in one room, or grout and paint that stay slightly damp
• Running water inside a wall at night, when the house is quiet

Before you call, shut every fixture off, note the meter reading, wait an hour and read it again. If the number moved, water is leaving the system somewhere. That single test tells us more than any description over the phone.

How we find it without opening walls

Detection is layered. It starts with isolation: pressurize the system, close valves in stages, watch which zone loses pressure. That step alone can cut the search from a whole house to one branch line.

Then the tools narrow it. Acoustic equipment amplifies the hiss a pressurized line makes as water escapes a pinhole, and ground microphones hear that through concrete, tile and soil. Thermal imaging reads surface temperature and finds hot supply leaks under slabs quickly, because escaping hot water warms everything around it. For lines that stay quiet, meaning cold water, plastic pipe or deep runs, we introduce a nitrogen-hydrogen tracer gas that migrates up through the slab and registers on a probe directly over the break. Drains get a camera instead, since an unpressurized waste line makes no sound worth chasing.

What drives the cost and the right fix

Two things set the price of detection: how much of the system has to be isolated and tested, and what the pipe is buried in. A leak above an open basement ceiling is a short visit. A cold-water line under a finished slab with tile over it takes tracer gas, more equipment and more time.

The repair is the bigger decision. A single pinhole in otherwise sound copper is a spot repair. But copper that has failed once from aggressive water tends to fail again within a few feet, and rerouting that line overhead usually costs less than opening the same slab twice. Galvanized supply pipe is at end of life the moment it starts weeping at the threads. You get told which of those three you are looking at, with the price, before work starts.

What leaks look like in this footprint

Well water drawn off granite bedrock across New Hampshire and southern Maine runs hard and often acidic. Acidic water eats copper from the inside out, and the result is not a burst. It is a pinhole that weeps for months behind finished space, which is why those homes so often discover the leak as a ceiling stain rather than a sound.

Cold does the rest. Frost drives deep here, and pipes in unheated crawl spaces, garage walls and slab edges split during a January cold snap but move no water until the thaw. On the Jersey Shore the water table sits high, so water escaping under a slab has nowhere to surface: the meter keeps turning while the floor stays dry. Older Jersey housing adds galvanized supply that leaks at threaded joints once corrosion takes hold.

Why homeowners call High Ground for it

Finding a leak is a capability you either invested in or you did not. The acoustic and thermal gear rides on our trucks, the plumbers running it are licensed and do this work weekly, and the same team handles the repair, so nobody hands you off once the mark goes on the floor.

A person answers the phone, and we run same-day where the schedule allows, because a leak is a clock. Pricing is upfront before anyone starts. Every repair carries our Lifetime Workmanship Guarantee: if the fix does not hold, we come back and make it right. Veteran-owned, licensed across New Hampshire, New Jersey and southern Maine, permits pulled where the work calls for them.

Related Plumbing services

• Water Heaters
• Drain Cleaning
• Sewer Lines
• Trenchless Sewer Lining
• Repiping