Pumping Power Requirement in Horse Power

GPM = Gallons per Minute
Head = Height of Water (ft)
Efficiency of Pump = %/100
 PSI = Pounds per square Inch
Specific Gravity of Water = 1.0
 
1 CuFt per Sec. = 448 GPM
1 PSI = A Head of 2.309 ft (water weight)
62.36 lbs per CuFt at 62°F