How to tell you have a hidden leak before the damage shows
The hardest leaks are the ones you cannot see, and by the time water appears on a wall or a floor it has usually been running for weeks. Fortunately, hidden leaks announce themselves in measurable ways well before that, and the earliest signal is almost always the water meter.
Shut off every fixture and appliance in the house, including ice makers and irrigation. Find your meter and note the position of the low-flow indicator — a small triangle or dial that spins with even tiny flow. Wait fifteen minutes without using any water. If it has moved, water is leaving your system somewhere. That single test costs nothing and is the most reliable at-home leak check that exists.
Other reliable signs: a water bill that rises without a change in habits, a warm or hot spot on a floor, the sound of running water inside a wall with everything off, unexplained musty odors, paint or baseboard that bubbles or separates, a water heater that cycles more often than it should, or a foundation with new cracking. Any one of them justifies a call before it becomes a restoration project.


