The sewer line connects the interior drain pipes in your home to the municipal sewer systems and is responsible for removing wastewater from the house safely. That makes them arguably the most important length of pipe in the entire system. They’re usually protected from damage because they’re buried under your yard, but damage can still find them regardless.
Sewer pipes can become clogged just like any other pipe, and age can take its toll by creating cracks and leaks over time. Tree roots can infiltrate the pipe, shifting soil can damage it, and while sewer pipes tend to be much sturdier and longer lasting than other pipes in the system, any problems with them are compounded by the fact that the pipe is located underground.