Friction Loss Calculator
Williams-Hazen formula · C = 150 (thermoplastic pipe)
GPM
PSI Loss per 100 ft
5.597
Velocity (ft/sec)
4.22
SIDR · All PSI · 1/2" · 4 GPM
SIDR · All PSI · 1/2" · I.D. 0.622" · 4 GPM · 5.597 PSI Loss per 100 ft · 4.22 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.