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*Note: Flows with asterisk (*) are NOT UL CERTIFIED and are not part of the UL Classification. The accuracy of these flowsare based upon theoretical discharge calculations. *Solid Bore Discharge Formula: 29.71D2√NP , D = Bore Diameter, NP = Nozzle Pressure Measured with Pitot Gauge (PSI).References: Interna onal Fire Service Training Associa on (IFSTA) Fire Protec on Publica ons - Fire Stream Prac ces - 7th Edi on.Always follow the most current NFPA 1911 when tes ng with the Apparatus Flow Test Kit.