PVC Pipe Schedule 40 - Friction loss and Velocity Diagram

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Friction loss (psi/100 ft) and velocity for water flow in plastic PVC pipe schedule 40

The diagram below indicates friction loss for water flow through plastic schedule 40 PVC pipe.

Plastic Schedule 40 PVC Pipe - Friction loss and Velocity Diagram

The calculation is based on the Hazen-Williams Equation with a Hazen-Williams coefficient c = 140. Note that velocities above 5 feet per second should be avoided.

1 gal (US)/min =6.30888x10^-5 m³/s = 0.0227 m³/h = 0.06309 dm³(litre)/s = 2.228x10^-3 ft³/s = 0.1337 ft³/min
1 ft/s = 0.3048 m/s
1 psi (lb/in²) = 6,894.8 Pa (N/m²) = 6.895x10^-3 N/mm² = 6.895x10^-2 bar = 27.71 in H₂O at 62^oF (16.7^oC) = 703.1 mm H₂O at 62^oF (16.7^oC) = 2.0416 in mercury at 62^oF (16.7^oC) = 51.8 mm mercury at 62^oF (16.7^oC) = 703.6 kg/m² = 2.307 Ft. H₂O

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