OS&Y Valves

OS&Y (Outside Screw and Yoke) valves are gate-type shutoff valves designed with an external threaded stem that provides a clear visual indication of valve position (open or closed). Commonly used in fire protection, HVAC, plumbing, and industrial piping systems, OS&Y valves allow for reliable isolation of flow while enabling easy inspection and system supervision. These valves are widely used in sprinkler systems, standpipes, and commercial water distribution systems where code compliance and operational visibility are required. Available in flanged, grooved, and mechanical joint configurations, OS&Y valves are typically used in applications requiring supervised shutoff and dependable long-term performance.