Main Sewer Line
The buried lateral pipe that carries all household wastewater from the home to the municipal sewer or septic tank.
Quick answer
Main Sewer Line: The buried lateral pipe that carries all household wastewater from the home to the municipal sewer or septic tank. Typical cost: $3,500–$25,000 to replace; $200–$600 for camera inspection..
Why it matters
Sewer-line failures are one of the largest unplanned home expenses and are almost never covered by homeowners insurance.
Typical cost
$3,500–$25,000 to replace; $200–$600 for camera inspection.
Pros
- • Modern PVC or HDPE lasts 75+ years
Cons
- • Tree-root intrusion in clay and Orangeburg pipes
- • Excavation can damage landscaping
Common uses
- • Every home connected to municipal sewer or septic
Alternatives
Trenchless pipe bursting or lining (avoids full excavation)
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Frequently asked questions
- When should I scope my sewer line?
- Before buying any home older than 30 years, and after recurring backups.
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