Most fog nozzles are designed to operate at what nozzle pressure?

Most fog nozzles are designed to operate at a nozzle pressure of 100 PSI. The reason for this specific pressure setting is that it provides an optimal balance between effective reach and dispersion of water droplets. At this pressure, the nozzle can produce a fine mist that enhances cooling and extinguishment capabilities while ensuring good visibility and control over the water stream.

Additionally, the performance characteristics of fog nozzles, such as pattern control and flow rate, are engineered with 100 PSI in mind, maximizing their effectiveness in various firefighting scenarios. Operating at this pressure also helps ensure the nozzle maintains adequate flow rates necessary for combating different types of fires, making it a standard practice among firefighting professionals.