1.1 ,This specification covers cold-expansion fittings using metal compression-sleeves for use with crosslinked polyethylene (PEX) plastic pipe in ³/₈-in., ¹/₂-in., ⁵/₈-in., ³/₄-in., 1-in., 1¹/₄-in., 1¹/₂-in., and 2 in. nominal diameters, meeting the requirements of Specification F876 or F3253, and for use with Polyethylene of Raised Temperature (PE-RT) pipe in ³/₈ ,, ¹/₂ ,, ⁵/₈ ,, ³/₄ ,, 1, 1- ¹/₄ ,, nominal diameters meeting the requirements of Specification F2769, whereby the pipe is cold-expanded before fitting assembly. The components covered by this specification are intended for use in residential and commercial, hot and cold, potable water distribution systems or other applications such as municipal water service lines, radiant panel heating systems, hydronic baseboard heating systems, snow and ice melting systems, geothermal underground pipe systems and building services pipe with continuous operation at pressures up to and including 100 psi (690 kPa), and at temperatures up to and including 180 ,°,F (82 ,°,C).