Abstract
This article discusses two methods of leak detection, namely listening and a combination of flow measurements and listening, sometimes referred to as a water audit. Listening involves the systematic use of sound intensifying equipment to locate leaks. Electronic and mechanical equipment are used for listening. Mechanical devices include the aquaphone and geophone. Both are described and their uses explained. The water audit compares the amount of water pumped into the distribution system to the amount withdrawn by the consumers. The audit is a two‐phase survey using flow measurements followed by listening. The water audit not only locates leaks, but can determine whether master meters are over‐ or under‐registering.
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