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With PEX systems, homes experience fewer connections, which are potential leak points. Furthermore, the connection points do not require the use of flux or chemical adhesives that can leak into the water system. PEX has been approved for continuous hot-water recirculation and can expand up to 300 percent its original size without sustaining any damage. The piping is flexible and resistant to freezing. In addition, the material resists pitting, scaling, and corrosion, which are common concerns when other systems start to age.