User's Manual Part 10

Good practice tips (continued)

When sensors are attached to fittings on lateral connections, the length of lateral

connections, up to the position where the sensor is attached, should be included in the total

sensor-to-sensor distance. If the lengths of lateral connections at the two sensor

positions are equal, they may be excluded from the total distance. In the latter case, the leak

distance will be with respect to the point where the lateral connection branches off the

pipe.

For plastic pipes, it may not be possible to locate leaks with sensor-to-sensor spacing greater

than 100 m (328 ft). For metal pipes, sensor-to-sensor spacing can be as large as 500 m (1640

ft) but a maximum spacing of 200 m (656 ft) is recommended.

Wireless transmitters and receiver should be placed at least 30 cm (1 ft) above ground to

minimize RF signal loss.

Wireless transmitters should be in line-of-sight from the receiver’s position and the latter

should be positioned halfway between the transmitters to maximize the range.

Velocity values are calculated by LeakfinderRT on the assumption that the fluid carried by the

pipe is water. These values are approximate and are provided only for the user’s convenience for

preliminary leak location. Leak positions based these approximate values can be

inaccurate. It is strongly recommended that the propagation velocity be measured onsite

using a known in-bracket or out-of-bracket simulated leak, e.g., by drawing water at a fire

hydrant or service connection.

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