Which method is used to detect improper connections in sewer lines?

The use of TV inspection is an effective method for detecting improper connections in sewer lines. This method involves using a remote-controlled camera that is inserted into the sewer system. The camera provides real-time video footage of the interior conditions of the pipes, enabling operators to visually inspect for issues such as illicit connections, clogs, and structural damage.

TV inspection is particularly valuable because it allows for detailed observation of the inside of the pipes without the need for excavation, which saves time and reduces costs associated with repairs. The ability to pinpoint and document issues visually gives maintenance personnel the information required to make informed decisions on maintenance and repair actions. This method is widely regarded as one of the most effective technologies available for sewer line assessment, ensuring that any improper connections can be promptly identified and addressed.

Other methods, while useful in certain contexts, do not provide the same level of detailed visual insight into the sewer system. For instance, DO tests measure the dissolved oxygen in wastewater to assess water quality, not pipe connections, while soundings involve measuring the depth of the sewer line but do not provide images of its condition. Radar technology may be used for underground mapping but is not specialized for detecting improper connections in the context of sewer maintenance.