The NIBCO® horizontal swing check valve is constructed of high quality lead-free* dezincification-resistant (DZR) performance bronze silicon alloy per ASTM specifications. The lead-free valve is recommended for applications that deliver water for human consumption, including commercial and residential construction. The swing check valve prevents backflow by automatically closing when fluid reverses direction. The check valve features a Y-pattern design with renewable seat and disc, and solder end connections for ease of installation.