Will vinegar kill roots in a sewer line?

No, vinegar will not kill roots in a sewer line. While vinegar is acidic and can kill some types of plants, it is not strong enough to kill the roots of trees and shrubs that typically cause problems in sewer lines. These roots are often thick and woody, and they can easily penetrate the walls of a sewer pipe. To get rid of roots in a sewer line, you will need to use a more powerful chemical or mechanical solution.