Detecting and Localising a Leak in an Underground Water Pipe

March 10, 2025

Background

Utilities such as water supply, wastewater conveyance, and power lines are often buried underground in congested urban areas to optimize space. While this underground setup maximizes space, it also creates significant challenges for maintenance and repair, particularly in older infrastructure where as-built drawings may be missing or unreliable.

One of the key issues is with leaking water supply lines, which are pressurized to ensure proper flow. As these lines age or shift due to ground movements, leaks can lead to significant water loss and potential damage to surrounding structures. Quickly pinpointing the location of these leaks is essential to minimize disruption and water loss. The Gutermann Acoustic Leak Noise Correlators, now enhanced with AI analysis, provide an effective solution by enabling precise leak detection, allowing for quicker and more efficient repairs.

Benefits of Gutermann AquaScope 620L Leak Correlators

  • Leak detection and location without the need for digging.
  • AI analysis of acoustic leak signatures enables precise detection and localization, eliminating subjective human interpretation.
  • Coverage: Detects leaks over distances of up to 300 meters.
  • Easy deployment for efficient use in various settings.

Case Study in point

A water ponding issue was observed in an open-air carpark facility, even on sunny days. The ponding would disappear when the main water valve was turned off, confirming a leak in the water supply line running under the carpark.

However there were no as-built drawings of the water pipelines running underneath the carpark. To locate the leak, the Gutermann AquaScan 620L Leak Correlators were deployed at the water valve outside the carpark and at the pipe junction in a building adjacent to the carpark, approximately 21 meters apart. The leak was detected around 11.8 meters from the water valve.

To confirm the precise location, a Gutermann AquaScope 3 Ground Microphone was used, as the pipe layout under the carpark was unknown.

Excavation at the identified location confirmed the leak.

Q&A

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