What is defined as a large-volume stream that discharges 300 gallons per minute or more?

A large-volume stream that discharges 300 gallons per minute or more is referred to as a master stream. Master streams are commonly used in firefighting scenarios requiring significant water volume, such as combating large-scale structural fires or controlling severe fire conditions. These streams are typically deployed from fixed monitors, aerial devices, or large-diameter hoses, enabling fire brigades to deliver a substantial amount of water to effectively suppress fire and protect both property and lives.

The master stream's capacity to discharge high volumes of water is critical in achieving rapid extinguishment of fires, particularly when conditions are challenging or when quick action can mitigate potential fire spread. Understanding this concept is essential for facility fire brigade members, as effective fire suppression relies on the ability to utilize various types of streams appropriately based on the intensity and scale of the fire incident.