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After repair · Homeowner guide

Drains still back up after sewer lining: what to document

A backup after lining needs investigation, but it does not prove the liner itself failed. A remaining branch restriction, connection issue, unrepaired section, or downstream problem can cause similar symptoms. Preserve the installation record and report the pattern to the responsible provider.

Illustration explaining CIPP pipe lining
Service illustration · not a photograph of a completed customer job

Philly Trenchless · After repair · Published October 28, 2026 · 2 min read

Describe the post-work behavior

Note the first occurrence, affected fixtures, weather, and whether the issue is intermittent. Stop adding water if an overflow is developing. Keep the original scope, final inspection video, warranty, and any change orders together for the provider’s review.

Ask for a comparison inspection

The useful question is how the current condition compares with the recorded finished job. Ask the technician to inspect accessible connections, liner endpoints, and unrepaired sections as well as the liner itself. Request copies of the new findings and an explanation of any area they could not reach.

Keep diagnosis separate from blame

If a defect is identified, ask how it relates to the contracted work and written warranty. Have any corrective scope and costs explained before authorization. Avoid assuming that a second company’s verbal opinion alone resolves responsibility; a documented condition is a better starting point.

Your next-step checklist

  • Collect the scope, warranty, and final video
  • Record exactly when and where backups occur
  • Compare current footage with installation footage

Discuss the next step for your property

For a Philadelphia service enquiry, call (267) 740-0245. Describe the symptoms, the address, and any inspection findings. Ask about CIPP pipe lining and confirm provider availability before arranging work.

This guide describes a problem scenario, not a completed customer job. It is general information, not a diagnosis, engineering design, coverage decision, or legal advice.

Further reading & official guidance

Confirm current requirements with the responsible department and the provider assessing your property.

Need help with a Philadelphia sewer problem?

Call with your address and symptoms. Ask about inspection options and current service availability.

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