PEX is cross-linked polyethylene. Through one of several processes, links between polyethylene molecules are formed 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.

PEX 's flexibility and strength at temperatures ranging from below freezing up to 200 degrees Fahrenheit makes it an ideal piping material

for hot and cold water plumbing systems, service lines,  hydronic radiant heating systems, snow melting applications, ice rinks and

refrigeration warehouses.

And PEX EVOH is produced from cross-linkable, high density polyethylene resin. This cross-linkable resin is produced

by grafting organo-silane molecules onto a base polyethylene chain. A catalyst that initiated the cross-linking process

is blended with the resin before extrusion. Cross-linking is completed after extrusion by exposing the tubing to heat and moisture.