Nozzles are labelled with their gallonage and pressure capacity. It can deliver 60 GPM at 100 PSI and 50 at 110 PSI with a nozzle.
A nozzle’s stream pattern affects its ability to fight fires. The cone-shaped stream of droplets produced by fog nozzles is called a fog stream. Using these droplets as a source of steam, a room can be quickly cooled. Water in straight streams is deposited into columns. Using this method, the discharge can travel further and penetrate deeper, but it is less efficient at removing heat or ventilating.