Flow (\( Q = \frac{k D^2 H^{1/2}}{287} \)):

Where:

• \( Q \) is the discharge, in liters per second (li/sec).
• \( D \) is the inside pipe diameter, in millimeters (mm).
• \( H \) is the vertical rise of the water jet, in meters (m).
• \( k \) is the discharge coefficient, varying from 0.87 for heights of 75 mm to 100 mm, to 0.97 for heights of 0.3 m to 0.6 m in pipes of 50 to 200 mm in diameter.