how long does cast iron drain pipe last
The average lifespan of cast iron drain/sewer pipe is 50 to 65 years. It is easily recognized by the thickened female âhubâ at each pipe segment connection. Rust eventually eats through cast iron, primarily from the inside out, as shown in the photo below. Because corrosion is accelerated by moisture, pipe with light effluent flow and installed in a dry environment can survive 20 to 30 years longer.