Friction Loss Calculator
Williams-Hazen formula · C = 150 (thermoplastic pipe)
GPM
PSI Loss per 100 ft
1.064
Velocity (ft/sec)
2.13
SDR-9 · 250 PSI · 1" · 4 GPM
SDR-9 · 250 PSI · 1" · I.D. 0.875" · 4 GPM · 1.064 PSI Loss per 100 ft · 2.13 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.