The ApolloPEX 1/2 in. Chrome-Plated Brass PEX Barb x 3/8 in. Compression Quarter-Turn Angle Stop Valve is simple to install and provides flow control through a quarter-turn ball valve. Most commonly used at point of use fixtures, it allows for repair and maintenance of fixtures without the need to shut down flow control to the entire system. The 3/8 in. compression outlet provides the capability to install 3/8 in. O.D. tubing or 3/8 in. supply lines. It is designed for use on point of use fixtures such as dishwashers, toilets and faucets. 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.