The NIBCO 4" Silent Check Valve F-910-B-LF is a high-quality valve designed for industrial applications. Made of durable cast iron, this valve is suitable for use with water and has a pressure rating of 200 psi. Its silent check valve type ensures quiet operation, making it a reliable choice for various plumbing and hydraulic systems. With a WOG rating of 200 psi and class of 125, this NIBCO valve is a durable and efficient component for check and foot valves in a range of industrial settings.