Which device splits one hose stream into two hose streams?

The device that splits one hose stream into two hose streams is known as a WYE. A WYE is specifically designed to allow a single hose line to branch off and supply multiple lines simultaneously. This is particularly useful in firefighting situations where water needs to be distributed to different areas or multiple firefighters may need to operate from the same source.

The WYE typically has one inlet, which connects to the primary hose, and two or more outlets. Each outlet can have its own hose attached, allowing for effective circulation and distribution of water. This is crucial in firefighting operations, ensuring that multiple areas can be addressed simultaneously without losing pressure or flow.

In contrast, a Siamese device is used to combine two hose lines into one, whereas pumps are used to increase water pressure. A manifold, while also used for distributing water, is designed to manage multiple connections and might not specifically split a single stream into two. Each of these devices serves different functions, emphasizing the distinctive role of the WYE in splitting a hose stream.