Friction Loss Calculator
Williams-Hazen formula · C = 150 (thermoplastic pipe)
GPM
PSI Loss per 100 ft
1.161
Velocity (ft/sec)
2.82
SDR-9 · 250 PSI · 1-1/2" · 11 GPM
SDR-9 · 250 PSI · 1-1/2" · I.D. 1.263" · 11 GPM · 1.161 PSI Loss per 100 ft · 2.82 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.