What is the PSI for a smooth bore nozzle on a handline?

The correct pressure setting for a smooth bore nozzle on a handline is generally around 50 psi. This standard helps to ensure that the nozzle can effectively deliver the desired flow rate while maintaining the appropriate balance of flow and pressure. At this pressure, firefighters can achieve a good reach and stream effectiveness without creating excessive velocity, which can complicate nozzle handling and control.

In practical terms, a smooth bore nozzle is designed to produce a solid, straight stream of water. Operating at this optimal pressure allows for better aim and penetration of the water stream into the target area, which is crucial for extinguishing fires efficiently and safely. The configuration of smooth bore nozzles also requires a lower operating pressure compared to some other nozzle types, which is beneficial for minimizing reactive forces that firefighters need to manage.

Moreover, this pressure allows the nozzle to effectively operate with most fire pumps and hose configurations typically used in firefighting operations, making it a widely accepted practice in fire service standards. Understanding the significance of this pressure aids firefighters in optimizing their approach to effective fire suppression.