What are the common causes of a sewer line backup?

Common causes of a sewer line backup fall into three groups: intrusions, buildup, and pipe defects. The most frequent trigger is material getting in through tiny gaps and then catching debris. Restrictions also form when everyday waste cools or snags. Low spots or shifts in the pipe let wastewater collect and grow a plug. Our technicians see these patterns often in the Waitsburg area. A camera inspection identifies the cause so we can choose cleaning, lining, repair, or replacement.

Specific issues that commonly cause backups:

• Tree roots entering through joints or cracks.
• Fats, oils, and grease congealing and trapping debris.
• Wipes, hygiene products, or paper towels that don’t break down.
• Pipe bellies, offsets, or collapsed sections from settling or age.

If sewage is coming up in showers or floor drains, stop water use and book a camera inspection right away. <br/> Updated: 2026-06-08 <br/> Need help in Waitsburg, WA? Call (509) 525-6688 or book online.