The answer to 'when to replace sewer repair' is that sewer lines typically need to be replaced every 40-50 years, or sooner if they experience frequent clogs, leaks, or damage. Sewer line replacement may be necessary if you notice signs of deterioration, such as slow draining, foul odors, or frequent backups. Regular maintenance and prompt repairs can extend the life of your sewer system, but eventually the pipes will need to be replaced to prevent further issues.
Sewer line replacement is a significant investment, so it's important to work with a professional plumber to assess the condition of your pipes and determine the best course of action. They can use video inspections and other diagnostic tools to identify any problems and recommend the most appropriate solution, whether that's a full sewer line replacement or targeted repairs.