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F-17 <br /> PiTMP SELECTION PROCEDURE <br /> END PERFORATION OF A PERFORATED LATERAL <br /> A. Determine pump capacity: �1-G_ <br /> Gravity Distribution Toa.NlAE <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of - ,r,,C-f...F°6,k(,,,o,- <br /> water use rate. `.,S"I.. =I"'"Wr.wow----dNr°..°,wY,pow) <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2cToa <br /> oo,700 �*�W o."'°�' '�°^'°'� <br /> nro Noe/ <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. Aw L.a.l Iz•I°ee,. <br /> o Flo)! of Rost L.Y. <br /> Porfaralar letslW of <br /> Pressure Distibution u.."Sen°'"y. <br /> 3.a. Select number of perforated laterals 12S <br /> b. Select perforation spacing feet. <br /> C. Sub" 2 ft.from the rock layer length. <br /> -2 ft._ to 6_feet. <br /> d. Determine the number of spaces between perforations. <br /> Length perf.spacing=-.(&J,ft.+ 'S__ft._ _spaces Required Perforation Discharge <br /> e. 32_spaces+1=. S perforations/lateral in gallons per minute(gpm) <br /> f. Multiply perforations per lateral by number of laterals to �/� DHh�adrge ;i2 em R,, i ad Pet <br /> get total number of perforations. IM- x A',,, , =�;�perforations. (feet)� x-;,*,=-=gpm. 1.Oa .56 0.74 <br /> SELECTED PUMP CAPACITY gpm 2.Ob 1.04 <br /> B.Determine head requirements: a.Use for single family homes <br /> 1. Elevation difference between pump and point of discharge. b.Use for all other applications <br /> _l2 feet <br /> 2. If pumping to a pressure distribution system,five feet for pressure <br /> required at manifold if gravity system,zero. <br /> feet <br /> 3.- Friction loss <br /> a. Enter friction loss table with gpm and pipe diameter. Pipe Length <br /> Read friction loss in feet per 100 feet from table. Point of Discharge <br /> F.L._ Q.to ft./100 ft of pipe <br /> b. Determine total pipe length from pump to dischargeElevation Difference) <br /> point. Add 25 percent to pipe length for fitting EIP-U'm' p )D� <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 times pipe length= F-18b <br /> if)0- x 1.25= /J 3 feet <br /> 1.5 inch 2inch 3.0 inch <br /> c. Calculate total friction loss by multiplying per gl� Friction per 100 R of pipe <br /> friction loss in ft/100 ft by equivalent pipe length. 10 0.69 0.20 <br /> Total friction loss= a,V x 1j 3 +100= 3 feet •12 0.96 0.28 <br /> 4. Total head required is the sum of elevation difference, 14 1.28 0.38 <br /> special head requirements,and total friction loss. 16 1.63 0.48 <br /> 18 2.03 0.60 <br /> 20 2.47 0.73 0.11 <br /> Z + S + _ 25 3.73 1.11 0.16 <br /> (1) (2) (30 30 5.23 1.55 0.23 <br /> 35 7.90 2.06 0.30 <br /> 40 11.07 2.64 0.39 <br /> TOTAL HEAD 0 feet 45 14.73 3.28 0.48 <br /> 50 3.99 0.58 <br /> 55 4.76 0.70 <br /> C. Pump selection 60 5.60 0.82 <br /> 1. A pump must be selected to deliver at least <br /> gpm (Step A)with at least ;� 0 feet of total head (Step B). <br />