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Cross-linked polyethylene tubing is used for a wide range of residential and commercial plumbing applications. Use Pex without oxygen barrier for potable water distribution and other water systems. Use Pex with oxygen barrier for radiant floor and hydronic heating applications.
PEX pipe is produced with cross-linked polyethylene. Cross-linking is obtained through a chemical process that increases the bonds between macromolecules to form a more complex structure than the- normal polyethylene. Due to the cross-linking, the polyethylene's performance is greatly enhanced and maintains the excellent properties of thermoplastics. Offering excellent corrosion resistance, incredible flexibility and unusual toughness, PEX pipe allows for fast and easy installation.
Pex is cheaper than copper. Hal-finch Pex tubing cost about a third the price of copper. Some of the savings will be offset by the need for a special tool to install the fittings, but if you’re doing a medium to large plumbing job, you’ll usually save by using Pex instead of copper.
Pex is faster to install than copper. If you use a manifold and “home-run” system, it’s like running a garden hose to each fixture--super fast and easy. But even if you install Pex in a conventional main line and branch system, the connections are quicker to make than soldering copper.
Pex won’t corrode like copper. If you live in an area with acidic water, copper can corrode over time. Pex is unaffected by acidic water and is therefore a better choice in these areas.