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5 Signs Your Main Sewer Line Is Failing

Drain Care · July 12, 2026 · 4 min read

Main line failures rarely happen without warning. These are the five signals homeowners across Los Angeles call us about most — usually a few weeks too late.

1. Multiple fixtures backing up at once

Placeholder content. A single slow sink is a fixture problem. A toilet that gurgles when the washer drains is a main line problem.

2. Clogs that return within weeks

Placeholder content. Repeat clogs on the same line almost always mean roots or a structural defect, not a one-off blockage.

3. Soggy or unusually green lawn patches

Placeholder content. A leaking lateral fertilizes the ground above it.

4. Sewer odor indoors or in the yard

Placeholder content. A properly sealed system should never smell.

5. Foundation or slab cracking near the line

Placeholder content. Long-term leaks wash out supporting soil.

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