Apollo PEX is cross-linked polyethylene tubing designed for use within potable water piping systems. Apollo PEX Pipe provides superior durability, corrosion resistance and flexibility for the most demanding environments. Apollo PEX is available in red, white and blue for the simple identification of cold water, hot water and main water lines. The Apollo PEX 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.