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• F-17 <br /> PUMP SELECTION PROCEDURE <br /> END PERFORATION OF A PERFORATED LATERAL <br /> A. Determine pump capacity: I C.-e C-- <br /> Gravity Distribution K T"-U <br /> 1. Minimum suggested is 600 gallons r hour(10 m)to stay ahead of _ }� <br /> gt� g l� ,. <br /> OC y d GaeNnIN FaMlc<or water use use rate. Nie LO0"'► °Ior.. wort ng g•eo Yn papr)Mr arse•w.e <br /> ' <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 Perlere�an mows H-a 1.11Y <br /> Inb cao H- T" <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. R«: Ike sea. <br /> :.. W <br /> PerfarelN-Lasted <br /> at <br /> Pressure Distibution view sat"Late, a." .t LAMM <br /> 3.a. Select number of perforated laterals <br /> b. Select perforation spacing= _feet. �Pk So4 L.'W <br /> C. Sub'tra�2 ft.from the rock layer length. <br /> -2 ft.=• (g Lg feet. <br /> d. Determine the number of spaces between perforations. <br /> Length perf.spacing= !�1 ft.+ ft.= 22 spaces Required Perforation Discharge <br /> e. spaces+1= a perforations/lateral in gallons Per minute(gpmj <br /> f. Multiply perforations lateral by number of laterals to 7/ Z" D e Z�� 34' <br /> �� <br /> get totallumber of orations. >,taala x I? =1�perfo a ons. (feet) <br /> g. x SPmi Ped c2�-gpm. <br /> 1.0a <6 0.74 <br /> SELECTED PUMP CAPACITY 3!�-gpm 2.Ob 0.80 1.04 <br /> B.Determine head requirements- a.Use for single family homes <br /> 1. Elevation difference between pump and point of discharge. b.Use for all other applications <br /> U feet <br /> 2. If pumping to a pressure distribution system,five feet for pressure <br /> required at manifold if gravity s stem,zero. <br /> feet <br /> 3. Friction loss <br /> a. Enter friction loss table with gpm and pipe diameter. Pipe Length <br /> Read friction loss in feet per 100 feet from table. Point of Discharge <br /> F.L.= a,to ft./100 ft of pipe TTtDi <br /> b. Determine total pipe length from pump to discharge Elevation Difference) <br /> point. Add 25 percent to pipe length for fitting PUMP <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 times pipe length= F-18b <br /> I -r_x 1.25= f)j -feet <br /> 1-5 inch 2.0 inch 3.0 inch <br /> c. Calculate total friction loss by multiplying Urn Bitot lau ptr loo n of Pipe <br /> friction loss in ft/100 ft by equivalent pipe length. 10 0.69 0.20 <br /> Total friction loss= ), (., x'_+100= Z feet 12 0.96 0.28 <br /> 4. Total head required is the sum of elevation difference, 14 1.28 0.38 <br /> special head requirements,and total friction loss. 16 1.63 0.48 <br /> 18 2.03 0.60 <br /> 20 2.47 0.73 0.11 <br /> + _+ 25 3.73 1.11 0.16 <br /> (1) (2) (3c) 30 5.23 1.55 0.23 <br /> 35 7.90 2.06 0.30 <br /> 40 11.07 2.64 0.39 <br /> TOTAL HEAD feet 45 14.73 3.28 0.48 <br /> 50 3.99 0.58 <br /> 55 4.76 0.70 <br /> G Pump selection 60 5.60 0.82 <br /> i <br /> 1. A pump must be selected to deliver at least <br /> J <br /> 3c) (Step A)with at least 13 feet of total head(Step B). <br /> i <br />