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PUMP SELECTfON PROCEDURE <br /> A. pump capacity <br /> Already determined from PRESSURE DISTRIBUTION PAGE, iine#7 <br /> Pump capacity = 29 GPM <br /> *" Pump capacity should be between 20 and 40 GPM for charging a manifold <br /> or for pumping to a gravity situation, ie, a drop box or distribution box. <br /> B. Determine head requirements <br /> 1. Elevation difference between pump and the point of discharge = 12 <br /> 2. If pumping to a pressure distribution system, add 5 feet of head required at the <br /> manifold. If pumping to a gravity system, use zero (0) feet of head. � <br /> 3. Determine friction loss <br /> a. Enter friction ioss table with gpm 28.6 and pipe diameter 2.0` <br /> FRiCTION LOSS IN PIASTIC PIPE <br /> FL01IY RATE NONpNAL PlPE DWAAETER FLOW RATE NAL PIPE DIMAETER <br /> 3N .^�`.� 1.5 2 3 N.d CPM! '!,s 2 3 <br /> 2U 2.47 0.73 0.11 36 6.98 2.08 0.30 <br /> 25 3.73 1.11 0.16 �Q 8.91 2.64 0.39 <br /> 30 5.23 1.56 0.23 45 11.07 3.2$ 0.48 <br /> Friction loss = 1.55 feet per 100 ft of pipe <br /> b. Determine total pipe length from pump to discharge point = 80.0 . <br /> Add 25% to pipe length above to account for fitting loss = 100.4 feet pipe <br /> c. Calculate total friction loss by muitiplyeng friction loss in ft/100 83a by <br /> equivalent pipe length B3b above = <br /> 1.55 X 100.00 equals 155.00 ! 100 = 1.6 ft head <br /> C. Total head required is the sum of the eievation difference B1 pfus addi4ional pressure <br /> for the manifotd B2 plus the total friction loss 3Bc. <br /> 12.0 pius 5.0 plus 1.6 equals 18.6 ft total head <br /> D. The Pump requires 28.6 gpm and 18.6 feet of head <br /> PAGE 9 OF 12 <br />