Which of the following is NOT a tool used for sewer rodding?

The lag screw is not a tool used for sewer rodding, which sets it apart from the other options. In the context of sewer maintenance, sewer rodding is a process employed to clear blockages in pipelines using a flexible rod or cable equipped with specialized tools at the end.

The pilot bit is designed to help create a path in the blockage, making it easier for the rodding tool to navigate through. Spring blades are used to dislodge and break up material within the pipeline as they can expand and grip problematic debris. The auger head is effective for drilling into compacted blockages, allowing for a more aggressive approach to clearing obstructions.

In contrast, a lag screw is typically utilized in construction and carpentry to fasten or secure materials together, and it does not have a relevant application in the process of sewers cleaning or maintenance. Understanding the distinct functions of these tools is essential for effective sewer system management and maintenance strategies.