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 and economical valve option in commercial, mechanical, fire protection and industrial applications. NIBCO gate valves are backed by the NIBCO 5-year 125% limited warranty.