The cast iron check valve features flanged end connections for easy installation. The swing check valve includes a renewable rubber disc and bronze seat ring. Swing checks may be installed in horizontal positions (or vertical with flow moving up). The check valve is recommended for automatic fire sprinkler systems and is UL/ULC listed and FM approved. Please refer to NIBCO technical data sheets, chemical resistance guides and catalogs for engineering and installation information. Choose NIBCO® check valves, for the most specified, versatile and economical valve option in commercial, mechanical, fire protection and industrial applications. NIBCO® check valves are backed by the NIBCO 5-year 125% limited warranty.