A true pioneer, Uponor sets the highest standards for plumbing, heating and residential fire protection. Just one example of this is crosslinked polyethylene tubing for potable water systems (PEX-a), first introduced by Uponor in the 1960s. Today, 12 billion feet of Uponor PEX-a is installed worldwide. It has become the trusted solution for residential and commercial plumbing/heating systems, as well as multi-purpose plumbing and fire sprinkler systems for both one- and two-family homes. Over three decades of proven excellence have shown that when properly designed, installed and operated, Uponor PEX-a systems will last as long as the structures they inhabit.