What is the function of a wye connection in firefighting?

The function of a wye connection in firefighting is primarily to split one hose stream into two streams. This allows for more effective distribution of water during firefighting operations, enabling firefighters to cover a larger area or address multiple points of fire simultaneously.

By using a wye connection, firefighters can attach two hoses to a single supply line, allowing them to coordinate attacks from different angles or simultaneously target multiple locations. This is particularly useful in situations where quick action is essential, and resources need to be maximized.

The other options do not accurately describe the primary purpose of a wye connection. A single hose stream is not the function of a wye; rather, it is designed to enhance the versatility of water supply at the fire scene. Connecting multiple hydrants is outside the scope of a wye's function, as it is specifically designed for hose management rather than hydrant connections. Lastly, while water pressure can be affected by various factors in a firefighting setup, increasing water pressure is not the wye's function; it's meant for splitting water flow, not modifying pressure levels.