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I. 17 <br /> CUM'SELL HON L'I(VCEDU1iL <br /> CIO PiRf0RAI ION Of A Pf Rf(MA1 fl I AIFRAf <br /> A. Determine pump capacity: <br /> Gravity Distribution haw; <br /> 1 Minimum suggested is 6(X)gallons per hour(10 gpm) to stay ahead of •-. <br /> (__.Sone lover pe( w..- fabs l.., <br /> water use rate. b.- b <br /> .7t,r.a....,oee.l <br /> 2 Maximum suggested for delivery to a drop box of a home system is 2,700 j: ..' P.r..region dl/�Re...en,ei <br /> h <br /> l a.Po.Cao Now toe <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. .;../.•fww r_ leo„ ,,. a(,9. <br /> PrterelNn lomr.a se <br /> Pressure Distibution Clean Sow/l„r< e.r.'e«l,r.'" <br /> 3. a. Select number of perforated laterals _ T <br /> h. Select perforation spacing= feet 4 ,� i17ee <br /> Lep.. <br /> c. Subtract 2 ft from the rock layer length. <br /> -2 ft.= feet. <br /> d. Determine the number of spaces between perforations. <br /> Length perf.spacing= ft.+ <br /> Discharge <br /> e. spaces+ 1= perforations/lateral spaces Rin equired Perforation <br /> per minute <br /> f get totall numberperforations <br /> perpforations � <br /> lateral by number of laterals to Discharge <br /> HL egad e AZ� 2,4'`"' nd� <br /> i>slea- perforations. (tee) <br /> g- x�Pe*= gpm. <br /> 1.0a 0.56 0.74 <br /> SELECI LL)PUMP CAPACITY 1-17 gpm 2.0b 0.80 1.04 <br /> B. Determine head requirements: <br /> 1. Elevation difference betweenrump and point of discha e. a. Use for single family homes <br /> b.Use for all other applications <br /> feet <br /> 2. If pumping to a pressure distribution system,five feet for pressure <br /> required at manifold if gravitsystem,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. t 1 <br /> F.L.= ft./100 ft of pipe Point of TDischarge <br /> b. Determine total pipe length from pump to discharge Elevation Differ,ncel <br /> point Add 25 percent to pipe length for fitting purn <br /> loss,or use a fitting loss chart. Equivalent pipe p <br /> length-1.25 times pipe length= <br /> F-18b <br /> x 1.25 = feet <br /> c. Calculate total friction loss by multiplying 1: �chlo 2.0 inch 3.0 inch <br /> gpm mo pc 100 h of pipe <br /> friction loss in ft/100 ft by equivalent pipe length. <br /> Total friction loss= x +100= 2.0 feet 10 0.69 0.20 <br /> 4 Total head required is the sum of elevation difference, 12 1.28 0.38 <br /> 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 /> S 20 2.47 <br /> 0_73 ! 0 11 <br /> + { 2S 3.73 I.II 016 <br /> (I) (21 (3c) 30 5.23 1 55 0.23 <br /> 35 1 7 9(1 2 06 0.30 <br /> TOTAL.HEAD L, 40 11.07 2_t 0 3<) <br /> �(/ feet a5 14 7, 3 28 0.48 <br /> 50 3 9') 0.58 <br /> 55 476 0.711 <br /> ( . Pump selection fU 5 6 ! u_82 <br /> I. A pump must be selec ed to deliver at least <br /> l gpnr (Step A) with at le,y,1 feet of total head (Stt'() li) <br />