Leak Detection

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How Many Miles of Pipe Can You Test in One Day?

The amount of pipe we can test often depends on the experience of the Leak Detector. Team members with many years of experience can test up to 10 miles of pipe a day on a metallic system (Cast Iron/Ductile). Experienced Leak Detectors can test a contact point (Hydrant/Valve) within a minute before moving on to the next one. Leak Detectors can work efficiently because they are trained to hear the specific tone that a leak produces compared to any other number of noises a general environment makes.

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Why Do You Have to Work in the Early Hours of the Morning?

Our acoustic listening equipment is highly sensitive and amplifies leaks and other noises which mask leak signals during the day. If we work in city environments, there is often a significant amount of ambient noise. This noise includes airplanes, traffic, mowers, machinery, and most importantly, people using water. It is up to the Leak Detector to determine if night work should be utilized to minimize all other noise to focus on the leak signal.

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How Confident Are You in a Leak Location You've Identified?

We have developed a rigorous leak detection methodology. We are confident in our leak location markings if all criteria are met using our available technologies.

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Can You Tell Me How Big the Leak You've Found Is?

After analyzing thousands of previous leaks detected, we asked clients to send us pictures of the remediation. This information has helped us compare our final leak signal detected with the results of the actual leak. We determine the size of the leak by how far the leak signal travels between contact points and the pitch of the tone received. However, we do not produce formal leak estimations.

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Why Don't I See Any Water at the Location You've Pinpointed as the Leak?

Water finds the path of least resistance. Water can run through cracks in subsurface rock or make its way into storm, sanitary, and conduit piping. If the subsurface contains a high volume of sand, it will naturally flow farther down. There is no water visible on the surface in more than 99% of the leaks we locate.

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What is Leak Detection?

GPRS's leak detection service is used to help municipalities and facilities maintain safe, efficient water distribution within a pressurized domestic supply network and fire protection systems. Often, water can leak from aging or broken infrastructure, creating unnecessary costs for clients. GPRS locates these water leaks, allowing our clients to reduce the number of costly excavations required for remediation.


GPRS does not investigate, analyze, or interpret soil composition, soil conditions, or geological or geophysical information. GPRS reports retrieved data and does NOT provide geophysical, geological, engineering, or land surveying services. Please contact a professional in those fields if such services are needed.