PVC Pipes Schedule 40 - Friction Loss vs. Water Flow
Friction loss (psi/100 ft) and velocity for water flow in plastic PVC pipe schedule 40, calculated using the Hazen-Williams Equation with coefficient c = 140.
Reference Information
Hazen-Williams Equation: The calculation is based on the Hazen-Williams Equation with a Hazen-Williams coefficient c = 140.
Recommended Velocity: Velocities between 7 to 10 feet per second are common. In general, velocities above 5 feet per second should be avoided.
Conversion Factors:
- 1 gal (US)/min = 6.30888×10⁻⁵ m³/s = 0.0227 m³/h = 0.06309 dm³(litre)/s = 2.228×10⁻³ ft³/s
- 1 ft/s = 0.3048 m/s
- 1 psi (lb/in²) = 6,894.8 Pa (N/m²) = 6.895×10⁻² bar = 703.1 mm H₂O at 61°F