The ApolloPEX 8 in. x 1/2 in. Copper PEX Barb Stub-Out 90 Elbow with Flange provides ultimate stability for stub-outs for stop valve connections to plumbing fixtures. The integrated mounting flange allows for the simple and secure installation of stub outs. The ApolloPEX 8 in. x 1/2 in. Copper PEX Barb Stub-Out 90 Elbow with Flange, secured to studs, floor joists, ceiling joists, or any number of structural components, is an extremely versatile product. 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.