Here’s an interesting twist to traditional sewer televising. Clay, plastic, concrete, reinforced concrete, brick, and other pipe materials don’t conduct electricity very well. So if it leaks electricity, chances are that the pipe also leaks water. Even better, you know exactly where the leak starts and stops. That’s the premise behind condition-assessment technology that won a 2013 Innovative Technology Award from the Water Environment Federation. The probe emits a “condensed” current (i.e., low-voltage/high-frequency) to examine pipe walls. In addition to finding leaks that closed circuit TV, laser profiling, dye flood, or smoke testing, the company says public agencies use the system to verify joint, service connection, and manhole insertions.

Electro Scan Inc.