What PSI do master streams typically operate under?

Master streams, which are large-capacity fire hoses typically used in firefighting operations, generally operate at a pressure of around 80 PSI. This pressure level is optimal for ensuring that a substantial amount of water can be delivered over considerable distances and heights to effectively suppress large fires. The design and engineering of master stream devices take into account the necessary pressure to overcome friction loss in the hose and the required reach of the water stream.

While other pressure levels may be used for different situations or equipment, 80 PSI is standard for ensuring efficient water flow and achieving the desired impact on fire suppression without causing excessive turbulence or compromising the equipment's capabilities.