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A. Determine pump capadty: <br />✓Gravity Distribution <br />1. Minimum suggested is 500 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 2,900 <br />gall ns 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 = -' it. <br />c. Su 2 it. from the rock layer length. <br />-2it. = ;in_ft. <br />d. Determh* the number of spaces between perforations. <br />Length perf. spacing = 9 C it. + -? it. = a '-� spaces <br />e. 5� 1) spaces + 1= y perforations/lateral <br />f. Multiply perforations per lateral by number of laterals to <br />get total nu of perforations. <br />x _ gW perforations. <br />g. `-Ia" x _L4') gpm <br />SELECTED PUMP CAPACITY '-1'7 gpm <br />B. Determine head requirements: - <br />Elevation difference between pump and point of discharge. <br />�i`- f, I 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 />t Add 25 roarlt to i Ie th for fittin <br />DO PERORATION OF A PEAFonATM LA►TEAAL <br />er. cam <br />ram 1... <br />'too* 99.514d <br />r�i6 «- <br />to <br />s oY le 9dP <br />ter <br />TAKE OF PERF40RAMON DSCiiAPZiS PI CPM <br />Herd Perforatkm dhowier Onclrrl <br />V. <br />1/4,1JU <br />' 036 <br />074 <br />13 <br />OA9 <br />0.90 <br />2.Ob <br />0.80 <br />1.01 <br />23 <br />0M <br />1.17 <br />3.0 <br />098 <br />129 <br />4.0 <br />1.13 <br />1A7 <br />SD <br />126 <br />1.6S <br />rUss lA foot of hnd for lasidel►tial syslesrI <br />bUse 2A feet of herd for other esubllsh rmb <br />pot" . pe p pe g g e uu.t'N <br />loss, or use a fitting loss chart. Equivalent pipe ti <br />CJ.: <br />length -1.25 times pipe length = ..: <br />1 1v <br />_ x 1.25 = )1 4l feet I ray <br />c. Calculate total friction loss by multiplying <br />friction loss in ft/100 ft by equivalent pipe length. <br />Total friction loss - - • ( - x 1 1 Y -100 = 4 feet <br />4. Total head required is the sum of elevation difference, <br />special head requirements, and total friction loss. <br />(.- + ) <br />(1) (2) (30 <br />TOTAL HEAD I feet <br />Pump selection <br />A pump must be selected to deliver at least gpm (Step A) <br />with at least J.5"' feet of total head (Step B). <br />Pipe Length <br />t- <br />Point of Dischar=e <br />Elevation DifTctettce <br />Pump ' . " <br />11 F-18b <br />1.5 inch 2.0 inch 3.0 inch <br />gprn Frkd= tou per 100 n of rip <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 />1.55 <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 />- ' - <br />-3.99 <br />0.58 <br />55 <br />4.76 <br />0.70 <br />60 <br />5.60 <br />0.22 <br />