How much friction loss does a standard master stream appliance typically incur?

A standard master stream appliance typically incurs a friction loss of approximately 25 psi. This value is significant in firefighting operations, as it plays a crucial role in determining the effective pressure at the nozzle when delivering water to combat a fire. Master stream appliances, which are used for large volumes of water and can provide greater reach and coverage, account for this friction loss in their design and operational guidelines.

Understanding this friction loss is essential for mobile pump operators, as it helps them to calculate the required pump discharge pressure needed to ensure that sufficient water reaches the nozzle under operational conditions. This knowledge enables operators to make informed decisions when setting up the pumping apparatus, ensuring optimal firefighting capabilities and effectiveness at the scene.