Nozzles & Equipment
Fog Nozzle
A fog nozzle breaks water into a cone of droplets and is built around a higher tip pressure than a smooth bore — a standard fog wants about 100 psi. The droplet pattern gives reach, absorbs heat, and can be adjusted from straight stream to wide fog.
By dividing the stream into droplets, a fog nozzle exposes far more water surface to the fire, which makes it effective at absorbing heat and producing steam. Many also let the firefighter change the pattern on the fly.
That performance depends on getting the design pressure. Below it the cone collapses, reach suffers, and flow drops — an under-pumped fog line looks like water and behaves like a delay.