The ApolloPEX Washing Machine Outlet Box includes 1/2 in. Brass F1960 PEX barb washing machine valves and is simple to install, it provides flow control through an anti-stick and smooth operating quarter-turn handle. Integrated Water Hammer Arrestor is designed to protect plumbing systems and fixtures from water hammer. Ideal for installations of washing machines. ApolloPEX barb fittings are a key component of the most economical potable water piping systems. Also capable of integration into hydronic heating systems, ApolloPEX valves can be secured into place using copper crimps, stainless steel pinch clamps or stainless steel crimp sleeves (all sold separately), 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.