The answer to 'how long does sewer line last' is that a typical sewer line has a lifespan of 50-100 years, depending on the material and installation conditions. Sewer lines made of cast iron or clay can last 50-80 years, while PVC or ABS plastic pipes can last 80-100 years with proper maintenance. However, factors like soil conditions, tree root intrusion, and usage can impact the actual lifespan of a sewer line.
It's important for homeowners to be proactive about sewer line maintenance, such as regular inspections and cleaning, to extend the life of their sewer system. Signs of a failing sewer line include slow drains, sewage backups, and foul odors. If you notice any of these issues, it's best to call a professional plumber to assess the condition of your sewer line and recommend the appropriate repairs or replacement.