A water bill that jumped 30% with no change in usage. A ceiling stain that keeps reappearing after painting. A soft spot in flooring with no visible source. These are signs of a hidden leak that's been running long enough to cause structural damage โ and every day it runs is money lost and damage accumulating. Masters Plumbing Service uses acoustic ground microphones, thermal imaging cameras, and precision pressure decay testing to locate leaks in South Berwick homes without speculative demolition.

No single detection method works for every leak scenario. Our techs are trained on four distinct approaches and select the right tool โ or combination โ based on pipe type, building construction, and leak characteristics.
Pressurized supply line leaks create a low-frequency sound as water escapes the pipe and contacts surrounding soil or structure. Our amplified listening devices filter background noise so we can triangulate the loudest point โ often to within 6โ12 inches of the actual break, through concrete slabs or behind drywall.
Particularly effective inside insulated wall cavities and for finding the extent of moisture spread beyond the immediate leak point โ telling us not just where the pipe is failing but how far the moisture has already traveled.
We isolate the supply system, pressurize to operating pressure, and monitor over a timed hold period. Any pressure drop confirms active water loss from the supply side. By isolating zones โ hot side vs. cold side, section by section โ we narrow down which branch is leaking before deploying detection equipment.
For leaks that don't produce sufficient acoustic signature โ very slow leaks, polyethylene pipe, or leaks deep under concrete โ we introduce a nitrogen/hydrogen tracer gas mixture into the isolated pipe and use a calibrated gas detector at the surface to find where the gas escapes. Sensitive to concentrations far below what produces an audible acoustic signal.
Our detection service covers the full property, not just the obvious locations.
Thermal imaging supplements acoustic detection for slab leaks, identifying the thermal anomaly that appears on the floor surface as water migrates through the concrete.

Wall and ceiling leaks are often traced by following a visible stain to its apparent high point โ but visible damage can be several feet from the actual pipe failure due to how water travels down framing members. Thermal imaging reveals the wet zone accurately, and acoustic equipment confirms the pipe location within the wall cavity.
Supply lines between the meter and the structure run underground and are vulnerable to corrosion, ground movement, and root damage. A main supply line leak shows as high meter usage with all interior fixtures off, sometimes with wet ground or sinkholes along the line path. Acoustic detection locates the failure in the buried line precisely enough to minimize excavation footprint โ we mark the surface above the leak so the repair crew opens only the section they need to.
Pool plumbing โ suction and return lines buried between the equipment pad and the shell โ develops leaks at fittings or in the pipe body that show as unexplained water loss. We pressure-test the pool plumbing circuit, isolate return and suction lines separately, and use acoustic detection to find which line and where.

Insurance claims for water damage from hidden leaks typically require documentation that the leak was not visible or detectable without specialized equipment. Our detection report includes: pressure test results confirming active water loss, detection method used, thermal imagery or acoustic mapping showing leak location, and technician certification information.
Commercial buildings have complex pipe networks where a supply or drain leak can go undetected through multiple floors before surfacing. We approach commercial detection systematically โ zone-by-zone pressure isolation, thermal scan of suspect surfaces, and acoustic confirmation.
Finding a hidden leak isn't a single step โ it's a protocol that combines water loss confirmation, zone isolation, and targeted detection in sequence.
This step confirms we're looking for a real leak rather than a meter error or normal appliance cycling.
Zone isolation turns "there's a leak somewhere in the house" into "the leak is on the hot side supply between the water heater and the master bath."
Within the isolated zone, we deploy thermal imaging first โ scanning walls, floors, and ceilings for moisture anomalies. Then acoustic equipment confirms the specific pipe location and narrows it to the tightest possible point. Tracer gas is added if acoustic results aren't conclusive.
Insurance-formatted reports are available for claims submission at the same standard โ no additional cost.

My water bill doubled over three months. Masters Plumbing Service confirmed the meter was moving with everything off, isolated the cold supply to the kitchen as the failing branch, and used the acoustic device on the slab to pinpoint a location 4 feet from the outside wall under the kitchen floor. The repair crew opened a 10-inch circle in the tile, found a pinhole copper elbow exactly where detection said it would be. I was genuinely amazed at the precision.
Ceiling stain in the living room kept coming back despite two drywall patches. Masters Plumbing Service ran the thermal camera and found the wet zone was traveling from a supply line joint 9 feet away, flowing down a horizontal framing member โ explaining why the patch kept failing. They marked the actual pipe location, we opened 8 inches of wall there, and the repair held. No more stain.
Pool was losing 2 inches per day โ more than evaporation. Masters Plumbing Service pressure-tested the plumbing circuit, isolated the issue to the return line, and ran acoustic detection along the line path to find the failure at a union fitting under the decking. Repair required pulling one deck board instead of the exploratory digging another company had proposed.
Masters Plumbing Service provides professional Leak Detection for residential and commercial properties throughout South Berwick and the surrounding South Berwick, ME service area. Detection appointments available most weekdays and Saturdays.

Masters Plumbing Service's detection team finds hidden leaks in South Berwick homes and commercial properties using equipment that eliminates guesswork. The detection appointment pays for itself the moment it prevents one unnecessary wall opening.
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