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Valves, fittings and accessories connected directly to the container, including primary shutoff valves, shall have a rated working pressure of at least 250 pounds per square inch gauge and shall be of material and design suitable for liquefied petroleum gas service. Cast iron shall not be used. Vapor piping with operating pressures not exceeding 125 pounds per square inch gauge shall be designed for that pressure. Vapor piping over 125 pounds per square inch gauge shall have a working pressure of at least 250 pounds per square inch gauge. All valves, fittings, accessories and piping shall be protected from mechanical injury.
(Coun. J. 12-9-92, p. 25465; Amend Coun. J. 2-7-96, p. 15616)