Fire Hose Friction Loss Calculator
FL = C × (Q/100)² × (L/100) · IFSTA / NFA coefficients
Hose size
1¾″ (C 15.5)
2″ (C 8)
2½″ (C 2)
3″ (C 0.8)
4″ (C 0.2)
5″ (C 0.08)
Flow (gpm)
Length (ft)
Friction loss
—
psi
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