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i <br /> 7/05/2003 �'age 2 � <br /> Pum� Selection Procedure <br /> Gravity Distribution � <br /> I <br /> Minimum suggested is 600 gallons per hour(10gpm)to stay ahead of water use rate. I ' ; <br /> Maximum suggesied for delivery to a drop box of a home system is 2,700 gallons per hour(45gpm)to � ! <br /> prevent build-up of pressure in drop-box. � ' � <br /> I ! <br /> I ' <br /> , <br /> A. Determine head requirements: � <br /> 1. Elevation difference befinreen pump and point of discharge= 12 feet � � <br /> 2. Head required for manifold= 0 �eet � <br /> � <br /> B. Calculate Head Loss: I <br /> � '' <br /> 1. Length of Discharge Line= �5.0 feet � <br /> I <br /> a. From friction loss table read friction loss per 100 ft.: 4 feet <br /> b. Friction Loss in Discharge Line= 2.60 feet � 'I � <br /> c. Add On Head Loss = 5 feet ( <br /> Total Head Loss= 20 feet <br /> A um must be selected to deliver= 26 Actual Pum GPM � ' <br /> P P P <br /> 20 Percent of Daily Flow Per pose <br /> I <br /> � ' <br /> � <br /> � <br /> !. <br /> � <br /> I <br /> � <br /> I <br /> � <br /> � <br /> I <br /> � <br /> f <br />