The 12 American Water Works Association C508 Swing Check Valve with is a heavy-duty, one-way valve designed to prevent backflow in water and wastewater systems. It operates using a swinging disc mechanism, which allows fluid to flow in one direction and automatically closes when flow stops. This valve meets AWWA C508 standards, ensuring reliable performance in municipal, industrial, and fire protection applications. Designed for use with or without a lever and weight. A spring kit is also available for alternative operation.