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What are the common causes of a sewer line backup?

The most common causes of a sewer line backup are either a blockage inside the pipe or a failure of the pipe itself restricting normal flow. Backups often start small; once wastewater slows, residue sticks faster and the clog builds. Our licensed crews routinely see this in the Centerville area and confirm the exact cause with a state-of-the-art drain camera before choosing the least invasive fix.

Typical sources a technician looks for:

  • Tree root intrusion through joints or small cracks
  • Accumulated debris creating a solid clog
  • Cracked, broken, or corroded pipe sections
  • Misaligned pipe joints that catch waste and slow flow

Most backups can be cleared and repaired, but widespread damage may require excavation and replacement after a camera inspection and diagnosis. If sewage is backing up indoors, avoid using water and call a licensed plumber right away.

Updated: 2026-06-18

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