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  7. What Causes Repeated Sewer Backups?
SEWER LINES

What Causes Repeated Sewer Backups?

Backups that keep returning usually mean a structural problem, like roots, a belly or broken pipe, that clearing does not fix.

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By PlumberDallas.com editorialUpdated October 14, 2026

Causes

  • Roots regrowing after cutting
  • Sags that collect waste
  • Offset joints catching debris
  • Grease buildup
  • Public main problems (rare; report to 311)

Break the cycle

Camera after clearing, then repair the defect.

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  • Why Do My Drains Keep Backing Up? →
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