What are the two primary types of fog nozzles currently in use?

The two primary types of fog nozzles currently in use are based on their operational characteristics, which are either constant gallonage or constant pressure.

Constant gallonage nozzles deliver a fixed volume of water regardless of the pressure behind the nozzle, providing a consistent flow rate. This type of nozzle is advantageous in specific firefighting scenarios where a steady supply of water is necessary and helps maintain effective suppression capabilities.

On the other hand, constant pressure nozzles maintain a set pressure while allowing the flow rate to vary based on the firefighter's requirements or changes in conditions. This design can be beneficial in situations where adaptability to changing circumstances is crucial, such as in firefighting environments where the thickness of smoke or fire intensity fluctuates.

Understanding these two types of fog nozzles is essential in choosing the right equipment for effective firefighting tactics and optimizing water application strategies.