What is the pump discharge pressure when a deck gun is mounted with a 1 1/2 inch tip?

The pump discharge pressure for a deck gun mounted with a 1 1/2 inch tip is based on the calculations involving the nozzle pressure required to achieve a desired flow rate. For a 1 1/2 inch tip, the commonly accepted discharge pressure to ensure effective operation and proper stream reach is typically around 90 psi. This allows the water to be effectively projected over distances needed for firefighting while also considering factors such as flow capabilities, nozzle design, and system efficiency.

In the context of this question, choosing 90 psi indicates a standard operational pressure that aligns with industry practices and guidelines for effective firefighting strategies. It ensures the pressure is sufficient to deliver an effective stream while balancing the need for manageable nozzle handling by firefighting personnel.