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MENEEMMM <br />A. Determine pump capacity. <br />-Gravity Distribution <br />1. Minimum suggested is 600 gallons per hour (10 gpm) to stay ahead of <br />water use rate. <br />2. Maximum suggested for delivery to a drop box of a home system is 2,700 <br />gallons per hour (45 gpm) to prevent build-up of pressure in drop box. <br />Pressure Distribution <br />3. a. Select number of perforated laterals <br />b. Select perforation spacing = ft. <br />c. Subtract 2 ft. from the rock layer length. <br />�►�-2ft.= ft. <br />d. Determine the number of spaces between perforations. <br />Length pert. spacing = ft. + ft. = spaces <br />e. spaces + 1 = perforations/lateral <br />f. Multiply perforations per lateral by number of laterals to <br />get total number of perforations. <br />x�_ •' I perforations. <br />SELECTED PUMP CAPACITY gpm <br />_ d. Determine head requirements: <br />�1. Elevation difference between pump and point of discharge. <br />J feet <br />2. If pumping to a pressure distribution system, add five feet for pressure <br />required at manifold <br />feet <br />3. Friction loss <br />a. Enter friction loss table with gpm and pipe diameter. <br />Read friction loss in feet per 100 feet from table. <br />F.L. = ft./100 ft of pipe <br />b. Determine total pipe length from pump to discharge <br />point. Add 25 percent to pipe length for fitting <br />loss, or use a fitting loss chart. Equivalent pipe <br />length -1.25 times pipe length = <br />x 1.25 = II feet <br />c. Calculate total friction loss by multiplying <br />friction loss in ft/100 ft by equivalent pipe length. <br />Total friction loss = x -L!_< +100 = feet <br />4. Total head required is the sum of elevation difference, <br />special head requirements, and total friction loss. <br />+ +'t_ <br />(1) (2) (30 <br />TOTAL HEAD I feet <br />F. Plump selection <br />A. A plump must be selected to deliver at least ! - gpm (Step A) <br />with at least ) ,� feet of total ;4 ad (Step B). <br />Eta PERFORATION OF A PERFORATED LATERAL <br />Grew com <br />T�wa <br />Pee. <br />� MM I, toupFAA �. lw« <br />cMM w ur« awnw M Lalwr <br />orNr.I t»e Fn s.wxae <br />TABLE OF PERFORATION DISCHARGES IN CPM <br />Head Perforation diameter (Inched <br />V/_ <br />,/' <br />1.0s <br />036 <br />0.74 <br />13 <br />0.69 <br />0.90 <br />21)b <br />0.80 <br />1.04 <br />23 <br />O.f19 <br />1.17 <br />3.0 <br />0." <br />12s <br />4.0 <br />1.13 <br />1.47 <br />SA 1 <br />126 <br />IAS <br />&Use 1 A foot of heed for residential sysksw <br />bUse 2A feet of head for other estabtishs is <br />Pipe Length <br />�Point of TTDisdtarge <br />Elcv,&WonePu <br />F-18b <br />1.5 inch 2.0 inch 3.0 inch <br />apm r k 6M b= F=100 n of Fie <br />10 <br />0.69 <br />0.20 <br />12 <br />0.96 <br />0.28 <br />14 <br />1.28 <br />0.38 <br />16 <br />1.63 <br />0.48 <br />18 <br />2.03 <br />0.60 <br />20 <br />2.47 <br />0.73 <br />0.11 <br />25 <br />3.73 <br />1.11 <br />0.16 <br />30 <br />5.23 <br />1.53 <br />0.23 <br />35 <br />7.90 <br />2.06 <br />0.30 <br />40 <br />11.07 <br />2.64 <br />0.39 <br />45 <br />14.73 <br />3.28 <br />0.48 <br />50 <br />3.99 <br />0.58 <br />55 <br />4.76 <br />0.70 <br />60 <br />5.60 <br />0.82 <br />