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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. Subt 2 ft. from the rock layer length. <br />Uns <br />-2ft.=moi _ft. <br />d. Determine the number of spaces between perforations. <br />Length pert. spacing = _ - ft. - ft. _ a- 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 .-�_ _LL0 perforations. <br />g• a x 4A'6 _ -3 --, gpm. <br />SELECTED PUMP CAPACITY `7 gpm <br />13. Determine head requirements: <br />1. Elevation difference between pymp and point of discharge. <br />I r 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. - D.6 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�ipe length = <br />�_ x 1.25 = _�_ feet <br />c. Calculate total friction loss by multiplying <br />friction loss in ft/100 ft by equivalent pipe length. <br />Total friction loss = t_ x�� +100 = -- feet <br />4. Total head requir-_,d is the sum of elevation difference, <br />special head requirements, and total friction loss. <br />-+'-+ -2- <br />(1) <br />(1) (2) (3c) <br />TOTAL HEAD rte_ feet <br />C. Pump selection <br />1. A pump must be selected to deliver at least gpm (Step A) <br />with at least 1 s'- feet of total head (Step B). <br />END PERFORATION OF A PERFORATED LATERAL <br />o... C. <br />TN«M <br />�,• hwr fMl LMS •. , LAK M ON1=IN irfk IM Iv• <br />a �1rM. pnr« <br />� Iw�� RwLswM1� <br />M Low W N up <br />N ar= L"W <br />`-PWk"WM Lm"d M <br />CN= s.r LarK ewww at <br />TABU OF Pts UMAIM DOCHARM IN GM <br />Hood Perforation diamelae Onches) <br />10 <br />0.69 <br />0.10 <br />IAN <br />036 <br />0.74 <br />13 <br />OAS <br />0.90 <br />2.Ob <br />000 <br />IAN <br />23 <br />020 <br />1.17 <br />3.0 <br />C.98 <br />128 <br />4.0 <br />1.13 <br />IA7 <br />3.0 <br />126 <br />IAS <br />allm 1.0 toot of head for m idmtW sllsiam <br />bUse 2.0 feet d Iwd for other awbUdwmis <br />Pipe Length <br />Point of TUi� arYc <br />Elevation Difference l L' <br />Pump °i <br />F -18b <br />1.5 inch 2.0 inch 3.0 inch <br />81M Fiiabo Io=W 100 n etriM <br />10 <br />0.69 <br />0.10 <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 />30 <br />3.99 <br />0.58 <br />55 <br />4.76 <br />0.70 <br />60 <br />5.60 <br />0.82 <br />