Cast Iron Pipe

Definition - What does Cast Iron Pipe mean?

Cast iron pipes are used in sewage networks for the purpose of conveying sewage from homes and offices. They are one of the oldest piping systems present today and are being largely replaced by high-density polyethylene (HDPE) pipes and polyvinyl chloride (PVC) pipes.

Some cast iron pipes are still in good working condition, but many have deteriorated and require replacement. Trenchless rehabilitation methods provide an effective method to replace such pipes by allowing for only those portions that have suffered damage to be removed.

Trenchlesspedia explains Cast Iron Pipe

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.

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