Sewer clogs can also be due to debris build-up, such as non-flushable items or they may be caused by tree roots growing into your sewer line that can not be removed without the help of your professional rooter service. You may need "rooter services" if you are experiencing the following: Sewage Odors Coming From The Drain.  Bubbling Drains Or Toilets Slow Drains in Multiple Fixtures Clogs In Multiple Drains  Sewage Coming Out Of a Cleanout Pipe