A true pioneer in the field, Uponor first unveiled crosslinked polyethylene tubing for potable water systems in the late 1960s. Thus, before others had entered the market, Uponor had thousands of feet of PEX-a working trouble-free in real-world installations. With 12 billion feet of Uponor PEX-a now installed worldwide, it has become the trusted solution for plumbing and heating systems for residential and commercial buildings, and multi-purpose plumbing and fire sprinkler systems for one- and two-family homes. Designed, installed and operated properly, Uponor PEX-a systems will last as long as the structures they inhabit.