Brass PEX-A Barb x 1/2 in.
Also capable of integration into hydronic heating systems, Apollo ExpansionPEX couplings must be secured into place Apollo ExpansionPEX sleeves or comparable expansion-type sleeve or ring (all sold separately). Brass PEX-A Expansion Barb x 1/2 in. The Apollo ExpansionPEX system is a comprehensive piping system comprised of lead free brass fittings, poly alloy fittings, manifolds, valves, fasteners, tools and tubing designed for implementation in water delivery systems, simple or complex.