Flow Loss Nomograph

Williams-Hazen formula · C = 150 (thermoplastic pipe)

GPM
PSI/100ft: 6.237 · Velocity: 5.62 ft/sec ⚠ high velocity
GPM I.D. (in.) PSI / 100 ft 1 2 5 10 20 50 100 200 300 0.5 1.0 1.5 2.0 2.5 3.0 0.01 0.05 0.1 0.5 1 5 10 20 6.237
DR-13.5 · 160 PSI · 3/4" · 11 GPM

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.