PEX Supply Water Piping

Cross-linked polyethylene (PEX) is a form of polyethylene with cross-links. It is made by a process that forms links between polyethylene molecules to create bridges (thus the term "cross-linked). This resulting material is more durable under temperature extremes, chemical attack, and better resists creep deformation, making PEX an excellent material for hot water and other applications. It doesn’t corrode or develop pinhole leaks, is chlorine-resistant, scale-resistant, and has fewer fittings, connections, and elbows than rigid plastic and metallic pipe.

Cross-linked polyethylene (PEX) is a high-temperature, flexible plastic (polymer) pipe. The cross-linking raises the thermal stability of the material under load. Thus, the resistance to environmental stress cracking, creep, and slow crack growth are greatly improved over polyethylene.

PEX pipe is approved for potable hot- and cold-water plumbing systems and hot-water (hydronic) heating systems in all model plumbing and mechanical codes across the U.S. and Canada. PEX piping systems are durable, provide security for safe drinking water, and use reliable connections and fittings. There are currently about ten domestic producers of quality PEX piping.

Brass fittings and couplings and polyethylene tees and elbows are available. Fittings are available in both mechanical compression and crimping styles, depending on application and manufacturer. In addition to domestic water supply systems, PEX tubing can be used for floor or wall radiant heating, and snow and ice melting systems in sidewalks and driveways.

PEX tubing is light weight, and it can withstand operating temperatures of up to 200° F (93° C). It is flexible and can easily be bent around corners and obstacles, and through floor systems. Sizes of PEX tubing range from 3/8-inch to over 2 inches.