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Water Supply Fixture Units (WSFU) and Pipe Sizing

Water supply fixture unit values, pipe sizing for cold and hot water distribution.

watersupplyfixtureunitsCalculator

Overview

Engineering reference data for Water Supply Fixture Units (WSFU) and Pipe Sizing in sanitary drainage.

Key Formulas

Manning's Equation

Q=1nARh2/3S1/2Q = \frac{1}{n} A R_h^{2/3} S^{1/2}

Open channel flow.

Slope

S=ΔhLS = \frac{\Delta h}{L}

Hydraulic gradient.

Variables

SymbolDescriptionUnit
QQFlow ratem³/s
nnManning roughness
AAFlow area
RhR_hHydraulic radiusm

References