PE-X pipe is ideal for plumbing projects that require a little more flexibility offers, and can be used virtually any place traditional copper pipe is used. Easily pulled through wood-framed walls, floor joints and ceilings, PEX is the preferred choice of builders and contractors for overhead plumbing applications. Made from cross-linked polyethylene, PEX tubing provides excellent chemical and corrosion resistance, making it suitable for harsh water conditions and aggressive environments. The pinhole leaks and premature failures that plague traditional metal piping systems are eliminated forever.