A sewer line that needs to be repaired or replaced is no minor inconvenience, it is one that could cause major issues in your home or yard. There are a few different problems that could lead to you needing a new sewer line. The pipes could have broken due to soil shifting or foundation settling. If the pipes are clogged, it will restrict the flow and could prevent the line from being able to be cleaned. The pipes could be corroded causing the line to collapse. Sometimes tree roots and come in and damage the lines.