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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. a ; I ft. <br />d. Determine the number of spaces between perforations. <br />Length pert. spacing = ft. + " ft. _ I '> spaces <br />e. I2 spaces + 1 = perforations/lateral <br />f. Multiply perforations per lateral by number of laterals to <br />get total number of perforations. <br />xperforations. <br />CL <br />g. L x � -'� i gpm <br />SELECTED PUMP CAPACITY L4 () _ gpm <br />B. Determine head requirements: - <br />Elevation difference between pump and point of discharge. <br />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 />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 />f x1.25- /Q0 feet <br />c. Calculate total friction loss by multiplying <br />friction loss in ft/100 ft by equivalent pipe length. <br />Total friction loss - 2 • 1, Li x D o +100 - a • L feet <br />4. Total head required is the sum of elevation difference, <br />special held requirements, and total friction loss. <br />+ + <br />(1) (2) (3c) <br />TOTAL HEAD J feet <br />C. Pump selection <br />A. A pump must be selected to deliver at least L4 0_ gpm (Step A) <br />with at least ) s feet of total head (Step B). <br />EW PERORATION OF A PERFORATED LATERAL <br />Tywa <br />-- lw� M QwM�nM Irrk Ir 1q- <br />L.�.A SW flee , 'lei low of my a Meer u"w« <br />.r - pow <br />�w O., WOW H-eMMMt <br />M Lwr W is EON <br />of i.a L"w <br />►wk Mlew LwM M <br />Clem Send L"W aw"..I Lel"I <br />wow. Pam. s�mr i s�.M.. <br />TAKE OF PERFORATION DWHARCES IN CPM <br />Head Perforation diumw (meth I <br />1/2 <br />1/, <br />1.08 <br />036 <br />0.74 <br />13 <br />Ob9 <br />M90 <br />2.Ob <br />OAD <br />I M <br />23 <br />0.0 <br />1.17 <br />0.99 <br />129 <br />1.13 <br />1.47 <br />126 <br />1.6S <br />Was 1.0 foot of head for waidaiitial 9yokw& <br />bU" 20 tat of bAnd for othar sebblebw awb <br />Pipe I. nsth <br />, <br />Point of D*bdwp <br />LIPMEkvetion Diffcvcr=I <br />p C14. J <br />F-12b <br />1.3 inch 2.0 inch 3.0 imb <br />On PYiolfe+MrrIdea dp4o <br />10 <br />0.69 <br />0.20 <br />12 <br />0.96 <br />0.22 <br />14 <br />1.28 <br />0.39 <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 />3.23 <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 />3.22 <br />0.48 <br />30 <br />3.99 <br />OM <br />55 <br />4.76 <br />0.70 <br />60 <br />5.60 <br />0.22 <br />