Gravity Leak Locating

& Fell 21

The Fell 21 is used to locate cracks and other faults in non-metallic pipe. A segment of pipe is isolated using plugs and the pipe segment is surcharged. A sonde is pushed through the length of the pipe, stopping at the farthest plug. As the sonde is retrieved, the electrical charge emitted by the sonde detects pipe defects and relays data to the computer.