Calculation of Water Flow Rates for Different Pipe Sizes
             (Hazen Williams Formula  -  U.S. units)
                         
Pipe Material:
     Hazen Williams Coefficient, C =      
                         
Pressure drop over the pipe length, DP = psi            
                         
Pipe                          Water Flow Rate in GPM          
Length                  Pipe Diameter in Inches          
ft    
   
   
   
   
   
   
  Hazen Williams Equation as used in this spreadsheet:            
      Q = 0.442 C D2.63(DP/L)0.54, where              
    Q is the water flow rate in gpm              
    D is the pipe diameter in inches              
    L is the pipe length in ft                
    DP is the pressure difference across pipe length L in psi