What is a structural defect in a sewer line?

A structural defect in a sewer line refers to damage that affects the physical integrity of the pipe. This includes issues like cracks, breaks, or any other deformities that compromise the pipe's ability to function properly. Such defects can lead to leaks, infiltration of groundwater, and ultimately, the failure of the sewer system if not addressed. Understanding the nature of structural defects is essential for maintenance and repair, as these issues typically require immediate attention to prevent further deterioration and to maintain the system’s integrity.

The other options revolve around operational issues rather than structural integrity. Blockages caused by debris, issues with capacity, and temporary clogs due to grease do not reflect physical harm to the pipe itself, but rather, they indicate conditions affecting how the sewer line operates. While these problems can lead to malfunctions, they do not alter the fundamental structure of the sewer line like structural defects do.