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A cross-linked polyethylene (PEX) pipe. Cross-linked polyethylene, commonly abbreviated PEX, XPE or XLPE, is a form of polyethylene with cross-links.It is used predominantly in building services pipework systems, hydronic radiant heating and cooling systems, domestic water piping, insulation for high tension (high voltage) electrical cables, and baby play mats.
Explosion at England's Imperial Chemical Industries (ICI) laboratory during a high pressure experiment with ethylene gas results in a wax like substance—later to become polyethylene and the re-beginnings of PEX pipe. [16] 1937: Frank Lloyd Wright designs the radiant heated Herbert Jacobs house, the first Usonian home. 1939
In 1995 Viega presented press technology that joined copper and PEX tubing to plumbing fittings. Products like Viega's ProPress and MANABLOC define a trend to mitigate installation errors. Green or innovative buildings use Viega or other related products for radiant heating and snow melt applications.
However, this practice fell out of use in the United States within 15–20 years because the Portland concrete was too corrosive on the copper tubing. In the 1980s Gypsum concrete again became widely used in the United States for radiant heat flooring as cross-linked polyethylene (PEX) tubing could be used with Gypsum concrete for radiant heat ...
Radiant heating and cooling originated as separate systems but now share a similar form. Radiant heating has a long history in Asia and Europe. The earliest systems, from as early as 5000 BC, were found in northern China and Korea. Archaeological findings show kang and dikang, heated beds and floors in ancient Chinese homes. Kang originated in ...
In underfloor heating, tubing is placed on the floor throughout the room and later covered with a concrete layer during construction. Also known as "radiant heat", underfloor heating uses a network of pipes, tubing or heating cables, buried in or attached beneath a floor to allow heat to rise into the room.