21122RW HeatLink 3/4 in 100ft Red Wall PureLink Plus UV Stabilized PEX-a PexCubeHigh molecular crosslinked polyethylene (PEX) with minimum bending radius of 6× the diameter at 68°F (20°C). Maximum operating temperature 180°F @ 100 psi (82°C @ 7 bar). Solid blue color for identification of cold water lines. The PureLink® Plus PEX-a tubing may be used with fittings that are compliant with ASTM F1807/F1960/F2080/F2098/F2159 standards. Flexible - easy installations UV stabilized Resists scaling and corrosion Freeze and chemical resistance