To the uninitiated, PEX is cross-linked polyethylene. Though often used in radiant heat installations, it is now being used quite a bit in hot and cold plumbing applications. Unlike rigid copper, it is easy to work with and is approved by almost all local building codes. The tubing is such a new advancement that allegedly it hasn't even made it into the books at some local associations. This article will focus on PEX, its applications, and how it is installed.http://www.doityourself.com/stry/install-PEX
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