The NIBCO® PRO-Stop® quarter-turn supply stop valve is constructed of high quality lead-free dezincification-resistant (DZR) brass alloy per ASTM specifications. The lead-free valve is recommended for applications that deliver water for human consumption, including commercial and residential construction. The specially designed PTFE seat and shell are 100% tested to ensure no leakage for the life of the valve. The NIBCO® PRO-Stop® straight supply stop valve features a blowout-proof stem and nitrile O-ring seal. The quarter-turn valve ensures trouble-free operation and ease of access. It has an oversized chrome-plated handle with a ribbed surface for ease of operation and gripping. Please refer to NIBCO® technical data sheets and catalogs for engineering and installation information. PRO-Stop® valves are backed by a NIBCO® 5-year limited warranty. Choose NIBCO® flow control products for the most specified, versatile and economical option in commercial and residential applications.