As the years go on, your sewer lines will need maintenance to keep them functioning. Everything that runs through your toilets and other drains will pass into the sewer line. This can sometimes include unorthodox items like toys, toothbrushes, and even clothes when you have children.
Regardless, debris will accumulate in your pipes and result in a clogged sewer line. Even tree roots can creep into your pipes, causing leaks or a collapse. Things happen that you can’t always account for, and when they do, you need to have them repaired before major issues occur.