What is the main purpose of large diameter hose in firefighting?

The main purpose of large diameter hose in firefighting is primarily for master stream applications. This type of hose is designed to transport large volumes of water quickly and effectively, which is essential when suppressing fires that require heavy water flow, such as structural fires or large wildfires. Master stream devices, including elevated streams and ground monitors, utilize large diameter hoses to deliver significant amounts of water over a wide area, enabling firefighters to control and extinguish intense fires more efficiently.

When a rapid and substantial flow of water is necessary, large diameter hoses are vital, as they minimize friction loss and facilitate the smooth operation of high-capacity nozzles and master stream appliances. This capability is critical in firefighting operations where speed and volume can make a significant difference in the outcome of the incident.