Description The ApolloPEX 1/2 in. Brass PEX Barb Polybutylene Coupling is simple to install and designed for the transition from polybutylene pipe to PEX tubing. Fitting includes crimp rings necessary for installation (black crimp ring is for use on PEX pipe and copper ring for polybutylene pipe). The ApolloPEX system is a comprehensive piping system comprised of brass fittings, poly alloy fittings, manifolds, valves, fasteners, tools and tubing designed for implementation in water delivery systems, simple or complex.PRODUCT DETAIL:Constructed of lead free dezincification resistant (DZR) brass for superior reliability and strength Most economical piping system available Compatible with PEX pipe Meets UPC, IPC and cUPC standard Can be secured in place using copper crimps, stainless steel pinch clamps or stainless steel crimp sleeves NSF listed Barb x barb connection for PEX plumbing systems Rated to 200F and 200 psi