The answer to 'how long does sewer line last' is that the average sewer line lifespan is 50-100 years, depending on the material and installation quality. Sewer lines made of cast iron or clay typically last 50-80 years, while PVC and ABS plastic pipes can last 80-100 years. However, many factors can affect the lifespan, including soil conditions, tree root intrusion, and proper maintenance.
Sewer lines are a critical part of a home's plumbing system, and it's important to monitor them for signs of aging or damage. Regular professional inspections and prompt repairs can help extend the life of a sewer line and avoid costly and disruptive full replacements.