What tool is commonly used to connect multiple hoses in a water relay operation?

The gated wye is commonly used in water relay operations to connect multiple hoses. This device allows firefighters to take one water supply line and split it into two or more lines, enabling efficient water distribution to multiple hoses or areas. Each outlet can have individual control via the gate valves, allowing firefighters to manage flow and pressure effectively.

In the context of a water relay operation, the gated wye is instrumental because it maximizes the available water supply, ensuring that all hoses in the relay can receive water simultaneously while maintaining the ability to adjust the flow as needed for different firefighting scenarios. This versatility is key in large-scale operations where coordination and water availability are critical for effective fire suppression.