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• <br /> PUMP SELECTION PROCEDURE <br /> 1. Determine pump capacity: <br /> .--:,.,A. Gravity distribution <br /> 1. Minimum required discharge is 10 gpm <br /> 2. Maximum suggested discharge is 45 gpm. For other <br /> establishments at least 10%greater than the water supply rate, <br /> but no faster thane rate at which effluent will flow out of the <br /> distribution device. <br /> B. Pressure distrib tion <br /> See pressure distri ution work sheet <br /> From A or B. Selected pump capacity: 3 4 gpm <br /> 2. Determine pump;head requirements: <br /> A. Elevation difference between pump and point of discharge? soil treatment system <br /> j. ') feet &p.nt discharge <br /> B. Special head requirement?(See Figure at right-Special Head Requirements) total pipe <br /> S feet leng <br /> 2A.elevation <br /> inlet e=�'�3' '` difference <br /> C. Calculate Friction loss pipe <br /> 1. Select pipe diameter . 0 in <br /> 2. Enter Figure E-9 witli gpm(lA or B) and pipe diameter(Cl). -'--=°'°"" <br /> Read friction loss in fret per 100 feet from Figure E-9 _Special Head Requirements <br /> Friction Loss= t." ft/100ft of pipe Gravity Distribution 0 ft <br /> 3. Determine total pipe length from pump discharge to soil treatment Pressure Distribution 5 ft <br /> discharge point.Estimate by adding 25 percent to pipe length for <br /> fitting loss. Total pipe length times 1.25=equivalent pipe length <br /> `� feet E-9: Friction Loss in Plastic. Pipe <br /> +"f D feet x 1.25 = Per 100 feet <br /> 4. Calculate total friction loss by multiplying friction loss (C2) nominal <br /> in ft/100 ft.by.,the equivalent pipe length(C3) and divide by 100. pipe diameter <br /> = ,to ft/100ft x 4`6 +100= a, ft <br /> flowrate1.5" 2" 3" <br /> D. Total head required is the sum of elevation difference(A),special 20 2.47 0.73 0.11 <br /> head requirements (B),and total friction loss (C4) 25 3.73 1.11 0.16 <br /> l ft+ 6r ft+ a ft= 30 5.23 1.55 0.23 <br /> 35 6.96 2.06 0.30 <br /> Total head: a4 feet 40 8.9134 0.39 <br /> 45 11.07 3.2a 0.48 <br /> 3. Pump selection �, <br /> 50 13.46 3.99 0.58 <br /> 55 4.76 0.70 <br /> A pump must be selected to deliver at least 3 B gpm 60 5.60 0.82 <br /> (1A or B)with at least .t.9.. feet of total head (2D) 65 6.48 0.95 <br /> 70 7.44 1.09 <br /> I hereby certify that ave completed this work in accordance with applicable ordinances, rules and laws. <br /> ---_ (7)- ,,e.-/:---- - (signature) 3(1)/ cj' (license#) 53 -13-0% (date) <br />