The answer to 'how does sewer repair work' is that sewer repair typically involves identifying and fixing issues with the underground pipes that carry wastewater from your home to the main sewer line. This can involve using specialized equipment to locate the problem, digging up the pipes, and repairing or replacing damaged sections.
Common sewer repair methods include pipe relining, where a new lining is inserted into the existing pipe, or pipe replacement, where the damaged pipe is dug up and replaced entirely. The specific approach will depend on the nature and location of the problem.