Figure 5-1. Spring inlet.
Note. Jet must be full-flowing + contraction or
Enlargement.
Flow in gpm = 2.83 D2 X
√Y
D = Inside diameter of pipe
X = Horizontal distance in inches
Y = Vertical distance in inches
Example, using formula:
Given: A 3-inch diameter standard pipe
(D) = 3.07") held 16 inches from ground (X 28")
16" X determined by measurement (X = 28").
2.83 x 3.072 x 28 = 2.83 x 9.4 x 28 = 187 gpm
√16
4
Figure 5-2. Flow of water through horizontal pipe.
MD0160
5-3