Cast iron pipes have a lifespan of 75 to 100-years but evidence shows that some have lasted for many more years. These cast iron pipes can handle lower wastewater pressures even if corrosion has occurred because of the thickness of its walls. Cast iron pipes corrode overtime but the rust forms a layer over the remaining pipe that prevents it from further corrosion. Cast iron pipes are also highly susceptible to tuberculation due to the textured nature of its surface that attracts bacteria into the tiny pockets on its surface.
The benefits of cast iron pipes still make it a good choice for installing in homes, but with cheaper and less tedious options available in the market, cast iron pipes are not used as much anymore. Trenchless rehabilitation methods such as sliplining, pipe bursting etc. can be used to replace damaged portions of such systems instead of replacing the entire plumbing system.