What is the measurement that defines a large diameter hose?

A large diameter hose is typically defined by having a diameter of 3 1/2 inches or more. This classification is important because large diameter hoses are primarily used for high-flow operations, such as supplying water to fire apparatus, water supply operations, and in some instances, transferring water from hydrants to tanker trucks. The increased diameter allows for a larger volume of water to be delivered quickly, which is crucial in fighting larger incidents or supporting dewatering operations.

In the context of firefighting operations, the effective use of large diameter hoses can significantly impact the overall efficiency and success of extinguishing larger fires or handling significant water supply needs. Understanding this classification helps firefighters make informed decisions about equipment and tactics during emergency responses.