10 Ductile Iron Flanged x Flanged Gate Valve Outside Screw & Yoke American Water Works Association C515The 10 Ductile Iron Flanged x Flanged Gate Valve Outside Screw & Yoke American Water Works Association C515 is designed for fire protection, municipal water systems, and industrial applications. The OS&Y design features a rising stem, which provides a clear visual indication of the valve's open or closed status. This makes it ideal for fire protection and high security water control systems. It meets AWWA C515 standards and is commonly UL Listed FM