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A. Determine pump capacity: <br />Gravity Distribution <br />1. Minimum suggested is 600 Itallons 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 e -- ft. <br />c. Subtract 2 It. from the rock layer length. <br />?-2ft.=Ll- ft. <br />d. Determine the number of spaces between perforations. <br />Length pert. spacing. � - ft. • _;. ft. aI'l spaces <br />c. i' I spaces + 1 11 t perforations/lateral <br />f. Multiply perforations per lateral by number of literals to <br />get total numbe7 of perforations. <br />t.:..r. x '�671-..r- 11 perforations. t Jt t <br />xLT�egpm. <br />SELECTED PUMP CAPACITY _ _ gpm <br />S. Determine head requirements: <br />1. 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 manifnid <br />feet <br />3. Friction loss <br />A. Enter friction lass table with gpm and pipe diameter. <br />Read friction lass in feet per 100 feet from table. <br />F.L. e I , / ft./ IOD ft o/ 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 />x1.25e I feet <br />c. Calculate total friction loss by multiplying <br />friction loss in ft/ 100 ft by equivalent pipe length. <br />Total friction loss e x r 1 4100 = <br />4. Total head required is the sum of elevation difference, <br />special head requirements, and total friction loss. <br />1 <br />(1) (2) (30 <br />TOTAL HEAD feel <br />feet <br />C. Pump selection <br />1. A pump must be selected to deliver at least _ gpm (Step A) <br />with at least feet of total head (Step BY <br />DO KWOrU1TtOM Or A I DWOMTLD LATIAIL <br />a.yrw a.a »rte <br />tww. Herr a.r .A <br />TAKIA OF PFRIK)RATION D190IARM IN CPM <br />I teed rer4oretton a tender Onctva) <br />ONNG h.e <br />To" <br />Lows" aer tweev " r <br />a <br />.re r ww <br />0.20 <br />wo pd .mr Pee <br />p <br />036 <br />0.74 <br />1 s <br />yMe.MM <br />0.90 <br />-N tam w urr <br />ICK�k _ <br />^ <br />2s <br />ti6wMW" Ln.4N M <br />cum WWI Low <br />ft-%- .r L.fe-0 <br />a.yrw a.a »rte <br />tww. Herr a.r .A <br />TAKIA OF PFRIK)RATION D190IARM IN CPM <br />I teed rer4oretton a tender Onctva) <br />10 <br />0.69 <br />0.20 <br />108 <br />036 <br />0.74 <br />1 s <br />069 <br />0.90 <br />2 Ob <br />0 a0 <br />l A4 <br />2s <br />0419 <br />1.17 <br />30 <br />0.911 <br />121 <br />40 <br />1.13 <br />1.47 <br />so <br />126 <br />IAS <br />.Uv 1.01001 of 1rad Oar r oWntial aymbe <br />bile= 2.0 ket o1 hwd for other eslabllsAwrwN <br />Pipe length <br />Point of Discharge <br />Elevation Dirrererrct <br />I <br />P l <br />F -tab <br />1.5 inch 2.0 inch 3.0 inch <br />IPn Rku. WN r. tooa'dry. <br />10 <br />0.69 <br />0.20 <br />12 <br />0.96 <br />029 <br />14 <br />1.28 <br />0.39 <br />16 <br />1.63 <br />0.49 <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 />1.35 <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 />0.41 <br />50 <br />3.99 <br />0.51 <br />55 <br />4.76 <br />0.70 <br />60 <br />5.60 <br />032 <br />