Friction Loss Calculator
Williams-Hazen formula · C = 150 (thermoplastic pipe)
GPM
PSI Loss per 100 ft
1.591
Velocity (ft/sec)
3.90
DR-13.5 · 160 PSI · 1-1/2" · 25 GPM
DR-13.5 · 160 PSI · 1-1/2" · I.D. 1.618" · 25 GPM · 1.591 PSI Loss per 100 ft · 3.90 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.