Drain Pipe, Drains, Drainage, Plumbing Pipe, Plumbing Pipes, Drainage Pipes, Steel Pipe, PipesCast iron is commonly used for all plumbing drain pipes 30 years ago. These cast iron pipes tend to corrode and burst over time and depending on the rate of corrosion it can have a life expectancy anywhere between 20 to 50 years. As shown here, the cast iron tee had formed two leaks and need to be removed and replaced.