Jones and Bartlett Firefighter 1 Practice Exam 2026 - Free Firefighter 1 Practice Questions and Study Guide

The device that splits one hose stream into two hose streams is known as a wye. A wye is specifically designed to take a single water supply line and divide it into two separate lines, each capable of functioning independently. This is particularly useful in firefighting operations where multiple handlines are needed to combat a fire simultaneously without reducing the flow of water.

In practical application, when a single hose line is attached to a wye fitting, the incoming stream of water is effectively divided, allowing firefighters to distribute the water to multiple locations or teams efficiently. The design of the wye includes two outlets that are oriented at an angle, which helps in maintaining a steady water supply to both lines while minimizing friction loss.

The other options, while related to hose management, serve different purposes. A Siamese is used to combine two hose streams into a single line, making it unsuitable for this particular function. A hose splitter, while it sounds similar to a wye, is typically a broader term that might refer to any device that splits hose streams, but it is not as specific in design as a wye. A diverter is a device used for redirecting the flow of water, often used in scenarios where water must be directed to different areas or apparatus