Cast iron sewer pipes have been a popular choice for drainage systems for over a century due to their durability, strength, and fire resistance. However, the lifespan of cast iron sewer pipes varies depending on several factors such as soil conditions, water quality, and installation quality. On average, cast iron sewer pipes can last up to 50-75 years or more. However, pipes installed in corrosive soil or subjected to excessive stress may fail sooner. Cast iron pipes can corrode over time, causing leaks or cracks, and can also develop blockages due to rust buildup and debris accumulation.
To extend the lifespan of cast iron sewer pipes, regular maintenance, such as cleaning, and repairs can help keep them functioning correctly. However, if your cast iron sewer pipes are older and are showing signs of corrosion or failure, it's best to consult with a licensed plumber or sewer specialist to assess the situation and determine if replacement is necessary.