The NIBCO Press System 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. The NIBCO Press System is user friendly, quick and easy to install. When properly crimped a unique ''''N'''' witness mark is clearly visible. The lead free HydraPure Performance Bronze ball valve is specifically designed for use in systems that deliver water for human consumption. Please refer to NIBCO technical data sheets and catalogs for engineering and installation information. NIBCO Press System applies the proven performance of press technology to NIBCO valves and fittings -- the most specified flow control products in the industry. The NIBCO Press System features a full range of precision engineered copper fittings, bronze valves, accessories, pressing tools, jaws and chains. NIBCO Press System valves are backed by a 5-year limited warranty. Because of its longstanding reputation for innovation and precision in design and manufacturing, NIBCO is the preferred brand in the industry.