The NIBCO® check valve features a screw-in bonnet for accessibility to repair or replace parts. Swing check valves 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® valves are backed by the NIBCO® INC. 5 years 125% limited warranty.