Which nozzle type has the highest flow rate?

The master stream nozzle is known for having the highest flow rate among the nozzle types listed. This type of nozzle is specifically designed to deliver large volumes of water over significant distances, typically used in fire suppression operations for large-scale incidents. Master stream nozzles can handle flow rates that can exceed 350 gallons per minute (GPM), making them highly effective for tackling heavy fire conditions or when rapid knockdown is crucial.

This high flow capability is essential during large fires, where quick and powerful water delivery can help control the situation efficiently. Master stream nozzles are generally mounted on apparatus such as aerial ladders or deck guns, allowing firefighters to operate from safer distances while still delivering a concentrated and effective stream to combat the fire.

In contrast, adjustable fog nozzles, cellar nozzles, and straight stream nozzles have lower flow rates tailored for specific applications such as providing flexibility in spray patterns, penetrating confined spaces, or managing smaller fires.