Water Leak Detection Methods Explained
No single tool finds every leak. Technicians combine methods.
Acoustic and ground microphones
Listen for the hiss or vibration of escaping water at points along the line.
Correlator
Two sensors on the pipe measure how long the leak noise takes to reach each, and the software calculates the distance. Best on metal pipe.
Thermal imaging
Spots temperature differences from warm-water leaks or damp materials.
Tracer gas
A harmless gas mix is injected into the empty line and sniffed at the surface. Useful on plastic pipe where sound is weak.
Pressure testing
Isolates sections of pipe to confirm where a drop occurs.
Pipe locating
Traces the route and depth of buried line. See the full underground leak detection service.
Think you have a leak? Call (425) 000-0000 or request service online. Tell us the address and what you are seeing.
Helpful guides
How to Tell If You Have a Water Service Line LeakA step-by-step meter test and the signs of a buried water line leak for Lynnwood homeowners.Who Is Responsible for the Water Service Line?How responsibility for the water service line typically splits between the utility and the homeowner in Washington.Water Leak Detection Cost in LynnwoodWhat affects the cost of water leak detection and service line repair in Lynnwood, WA, and how to compare quotes.How to Read Your Water Meter for LeaksFind your meter, read the low-flow indicator and do a 15-minute leak test.Water Leak Detection Methods ExplainedHow acoustic, correlator, thermal, tracer gas and pressure testing methods find leaks.Galvanized, Copper, PEX and HDPE Service Lines ComparedThe common water service line materials and how they fail.