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I' I7 <br /> r1IMr SELLL71CUN I'RVC:I:I)URI: <br /> ENO PfRfORAT ION (X A P112(()RAI ET) I Al ERA( <br /> A. l)etermine pump capacity: ._Geo. <br /> Gravity Distribution Lia '�� <br /> 1 Minimum suggested is 6(X)gallons per hour(10 gpm) to stay ahead of "�'._- - <br /> ( c .... rm. lo.'-. <br /> water use rate. la-+s-.,(^ �-• -w...- .»., <br /> 2 Maximum suggested for delivery to a drop box of a home system is 2,700 t T_•.,..: • -:7. '-'tom"-•.-.." <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. 4I. <br /> P„„ -• L.e.l lee.ray. <br /> .ld of Hoc*tar. <br /> P.1 S..,lw-1. <br /> ns <br /> Pressure Distibution CkW,$and t.,.. e «Let.,, <br /> 3. a. Select number of perforated laterals -_ _ _ _ -.- <br /> 11_ <br /> h- Select perforation spacing= feet z a^r med Sall PrepeAy Sra.(tlaa <br /> (Wan Placing Sand Lerw <br /> c. Subtract 2 fL from the rock layer length. <br /> 2 ft.= feet <br /> Rack layer herNstki <br /> d. Determine the number of spaces between perforations. <br /> Length perf.spacing= ft. + ft.= spaces Required Perforation Discharge <br /> e. spaces+ 1 = perforations/lateral in gallons per minute(gp(,) <br /> f. Multiply perforations per lateral by number of laterals to Discharge <br /> get total number of perforations. ,na,a x il.(r.,= perforations. Hemet) �z�� 2.,4- adpof <br /> g- x apm/pesE= gPm- <br /> 1.0a 0.56 0.74 <br /> SELECTED PUMP CAPACITY LTJ 7 gpm 2.0b 0.80 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 /> feet <br /> 2. If pumping to a pressure distribution system,five feet for pressure <br /> required at manifold if gravitys tem,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. 1 I <br /> Point of Discharge <br /> F.L= 25 -ft/100 ft of pipe T <br /> b. Determine total pipe length from pump to discharge Elevation Difference' <br /> point Add 25 percent to pipe length for fitting Pump <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 times plength= F-186 <br /> 2rx1.25 = 3 feet <br /> c_ Calculate total friction loss bymulti 1 n 1.5 inch 2.0 inch 3.0 inch <br /> P yi g %1n)l Frit3ion loo per 100 n of pipe <br /> friction loss in ft/100 ft by equivalent pipe length. <br /> Total friction loss= x . ' ad8. +100= 1,0 feet 10 0.69 0.20 <br /> 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 0.73 011 <br /> i + 25 3.73 1.11 016 <br /> ---------- ----- <br /> (1) (2) (3d 30 5.23 1 55 021 <br /> 35 790 2 06 I 0.30 <br /> TOTAL HIAl) 40 11.07 7(.4 i 0 3') <br /> y feet 45 14 7: 1.2E._ 4ti <br /> 50 399 I 05f) <br /> 55 4.76 0 70 <br /> C. I'urn p selection 60 5_60 i 0n2 <br /> 1 L A pump must be selected to deliver at least <br /> 1.17 gpm (Step A) with at h•,itit / feet of total head (Stop II) <br />