Friction Loss Calculator
Williams-Hazen formula · C = 150 (thermoplastic pipe)
GPM
PSI Loss per 100 ft
3.601
Velocity (ft/sec)
3.52
SDR-9 · 250 PSI · 3/4" · 4 GPM
SDR-9 · 250 PSI · 3/4" · I.D. 0.681" · 4 GPM · 3.601 PSI Loss per 100 ft · 3.52 ft/sec
Values are calculated using the Williams-Hazen formula (C = 150) and are provided for reference only. Interstate Plastic, Inc. makes no warranty as to accuracy or fitness for any particular use. Consult a licensed engineer for system design.