The NIBCO® bronze gate valve features a screw-over bonnet, female threaded ends and outside screw and yoke (OS&Y) stem/bonnet construction. It is FM Approved and tested and listed by Underwriters Laboratories of the US and Canada (UL/ULC) to be used in automatic sprinkler systems as a control valve. Please refer to NIBCO technical data sheets, chemical resistance guides and catalogs for engineering and installation information. Choose NIBCO® gate valves for the most specified, versatile andmore economical valve option in commercial, mechanical, fire protection and industrial applications. NIBCO® gate valves are backed by the NIBCO 5-year 125% limited warranty. less