What is a secondary pipeline in sewerage that has no other sewer tributary?

The correct answer is lateral. In the context of sewer systems, a lateral is a secondary pipeline that serves as a connection from a building or property to the main sewer line. It is specifically designed to drain wastewater from individual households or commercial establishments directly into the sewer system. A lateral typically does not have any other sewer lines merging into it, meaning it is a standalone line that operates independently.

This feature distinguishes laterals from other types of sewer pipelines. For example, interceptors are designed to capture and separate larger waste materials from the sewage flow before it enters the treatment system. A dead-end refers to a pipeline that does not connect to any other lines or systems, while a branch usually refers to a section of sewer where multiple laterals or tributaries converge. Hence, the lateral is the most accurate term for a secondary pipeline that operates independently without any other tributary connections.