PEX piping is a type of flexible plastic tubing used for plumbing and heating systems. It is made from cross-linked polyethylene, which makes it resistant to scale and chlorine, reducing the risk of corrosion. PEX is lightweight and easy to install, often requiring fewer fittings than traditional metal pipes. One of the main advantages of PEX piping is its ability to expand and contract, which helps prevent bursting in freezing temperatures. It is also available in various colors, allowing for easy identification of hot and cold water lines. Overall, PEX piping is a popular choice for both residential and commercial applications.