The NIBCO® Ring Check® valve has threaded end connections for ease of installation. This check valve may be installed in horizontal positions or vertical with flow moving up. Please refer to NIBCO technical data sheets, chemical resistance guides and catalogs for engineering and installation information. Choose NIBCO® valves for the most specified, versatile and economical valve option in commercial and residential applications. NIBCO® specialty valves are backed by a NIBCO INC. 2-year limitedmore warranty. less