User's Manual

Table Of Contents

2 STAR ZoneScan Technical Manual

Acoustic Leak Detection Overview

Management of water leakage consists of four key activities which include:

• measuring water loss

• locating leaks

• monitoring leakage

• repairing leaks

In order to understand leak noise, it is important to know the various sources of

constant noise. Acoustic leak detection equipment collects and evaluates this noise

to identify the probability of a leak.

Sources of Noise

The sources of constant noise in the water pipes include:

• leakage

• partial obstruction of pipe bore

• consumption (flow & meters)

• pressure reducing valves (PRVs)

• partially closed valves (throttled or passing)

• close proximity of main to sewer pipe

• changes in pipe diameter

• water pumping - swimming pool pumps

• electrical hum

• pipe lining

• air conditioning