What are common techniques used for inspecting sewer lines?

CCTV inspection and smoke testing are widely recognized as effective techniques for inspecting sewer lines.

CCTV inspection involves using a camera mounted on a flexible rod to visually assess the interior of sewer pipes. This allows technicians to identify issues such as blockages, cracks, or deterioration without having to excavate the pipe. The visual data collected can provide precise information about the condition of the sewer lines, which aids in determining the necessary maintenance or repairs.

Smoke testing is another method used to identify leaks and faults in sewer systems. In this process, smoke is introduced into the sewer lines, and any escape of smoke indicates a potential problem, such as a crack in the pipe or a faulty joint. This technique helps locate places where stormwater or surface water could be entering the sewer system, which can lead to overflows and other problems.

Both of these methods are proactive, efficient, and help in preventive maintenance strategies, thereby ensuring the longevity and functionality of the sewer lines.