7 signs of a slab leak (and what to do next)
Most homes in Coral Gables sit on concrete slabs. Here’s how to tell if a pipe under yours is leaking.
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Leak detection is the process of finding the exact spot where water escapes a pipe, without opening walls or floors to look. The goal is simple: one small, targeted repair instead of several exploratory holes.
Step 1: Confirm there’s a leak
Specialists usually start at the water meter. With every fixture off, a moving leak indicator confirms water is being lost. Then they shut off sections of the plumbing to see which part of the system is leaking.
Step 2: Narrow it down
Pressure testing
Each line is isolated and pressurized. If it can’t hold pressure, that line has the leak.
Thermal imaging
Infrared cameras show temperature differences. Hot-water leaks and wet areas appear as warm or cool patches.
Moisture mapping
Meters measure moisture in drywall, wood and flooring to trace water back toward its source.
Line locating
Electronic locators trace where buried pipes actually run, so the search follows the real route.
Step 3: Pinpoint the exact spot
Acoustic listening
Ground microphones and listening devices pick up the sound of water escaping a pressurized pipe, even through concrete or soil.
Tracer gas
A safe gas mixture is pushed into an emptied line. A detector finds where it escapes. Useful for very small or deep leaks.
Dye testing
In pools, colored dye released near fittings and cracks is pulled toward the leak, showing where water exits.
Video inspection
For drain and sewer lines, a small camera shows cracks, roots and breaks inside the pipe.
What you get at the end
A good result is a marked location on the floor, wall or ground, plus an explanation of what was found. That lets the repair be planned precisely, whether it’s a spot repair or rerouting a line.
Why it’s worth it
Opening a wall or floor in the wrong place costs time and money. Finding the leak first keeps the repair small. See our leak detection services or 24/7 emergency help.
Common questions
Is leak detection accurate?
Combining methods like pressure testing, acoustic listening and thermal imaging usually narrows a leak down to a small area.
Is leak detection invasive?
No. The detection itself is non-invasive. Opening is only needed for the repair, at the confirmed spot.
