What does the outside screw and yoke indicate when the stem is outside of the yoke?

When the stem is located outside of the yoke, it indicates that the water valve is open. This visual cue is significant because it allows firefighters and emergency personnel to quickly assess the status of the valve without needing to manipulate it or take additional measurements.

The outside screw and yoke configuration is designed to provide a clear and immediate understanding of the valve's position. When the stem is extended beyond the yoke, it confirms that water can flow through the valve, making it ready for use in firefighting operations.

In practical situations, knowing that the valve is open is crucial for efficient water supply management during emergencies, ensuring that the firefighters have the necessary resources available to tackle the fire effectively.