What is the operating pressure for most smooth-bore nozzles?

The operating pressure for most smooth-bore nozzles is typically set at 50 PSI. This pressure is effective for maintaining the necessary flow and reach of water while minimizing turbulence and ensuring a solid stream for effective firefighting. Smooth-bore nozzles function optimally at this pressure because it allows firefighters to deliver water with enough force to penetrate flames and reach the base of a fire, while also conserving water supplies during an incident.

In contrast, lower pressures may not provide sufficient reach or impact force on the fire, decreasing effectiveness, and higher pressures could lead to excessive water usage and potential fatigue for firefighters handling the nozzle. Thus, 50 PSI serves as a balanced standard that maximizes operational efficiency for smooth-bore nozzles.