Water Pipes Head Loss Calculator

pipe length (ft)
design coeff.
flow rate (gal/min)
hydr. diameter (inch)

Water Pipes Head Loss formula

f = 0.2083 (100 / c)1.852 q1.852 / dh4.8655

where

dh = inside hydraulic diameter (inches)

q = volume flow (gal/min)

c = Hazen-Williams roughness constant

f = friction head loss in feet of water per 100 feet of pipe (fth20/100 ft pipe)

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