Sprinkler Nozzle Discharge (\( Q_s = 30 \cdot C \cdot D_n^2 \cdot P_n^{0.5} \)):

Where:

• \( Q_s \) is the sprinkler nozzle discharge, in gallons per minute (gpm).
• \( C \) is the coefficient of discharge (0.95 to 0.98 for well-designed small nozzles and 0.80 for larger nozzles).
• \( D_n \) is the diameter of the nozzle orifice, in inches.
• \( P_n \) is the nozzle pressure, in psi.