Marketing InformationShut-off valve 850XL full port bronze ball valve is recommended for residential, commercial and industrial applications. This shut-off valve is used on Zurn Wilkins small diameter backflow assemblies for throttling and balancing installations of low pressure steam, air, water and non-corrosive gas or oil. Ideal for use in residential, commercial and industrial applications where lead-free valves are required, the pressure rating for the 850XL is 400 psi WOG with a temperature rating of 33 to 350 deg F at 50 psi. The quarter-turn, full port ball valves feature bronze body construction with chrome-plated brass ball.