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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 than the rate at which effluent will flow out of the <br /> distribution device. <br /> B. Pressure distribution <br /> See pressure distribution work sheet <br /> From A or B Selected pump capacity: 31 gpm <br /> 2. Determine pump head requirements: t <br /> A.Elevation difference between pump and point of discharge? soil <br /> em <br /> pant of discharge <br /> system <br /> a< 4f°a; <br /> feet <br /> pipe <br /> B.Special head requirement? (See Figure at right-Special Head Requirements) total length <br /> "" 2A.elevation <br /> S feet inlet Pipei, difference <br /> C.Calculate Friction loss Py <br /> 1. Select pipe diameter in ., <br /> 2. Enter Figure E-9 with gpm(1A or B)and pipe diameter(Cl). =-4"-'1t.. <br /> Special Head Requirements <br /> Read friction loss in feet per 100 feet from Figure E-9 Gravity Distribution 0 ft <br /> Friction Loss= s 5ft/100ft of pipe Pressure Distribution 5 ft <br /> 3. Determine total pipe length from pump discharge to soil treatment <br /> discharge point. Estimate by adding 25 percent to pipe length for <br /> fitting loss.Total pipe length times 1.25=equivalent pipe length E-9:Friction Loss in Plastic Pipe <br /> 5 0 feet x 1.25= (..93 feet Per 100 feet <br /> by multiplyingnominal <br /> 4.Calculate total friction loss multi 1 friction loss(C2) pipe diameter <br /> in ft/100 ft by the equivalent pipe length(C3)and divide by 100. �w rate 1.5" 2" 3" <br /> / •55 ft1100ft x (el 4-100=____}--____._ft gp2.47 0.1 <br /> m 1 <br /> D. Total head required is the sum of elevation difference(A),special 20 20 3.73 0.73. 1 0.11 <br /> head requirements(B),and total friction loss(C4) 25 5.23 1.55 0.26 <br /> /j ft+ 3.- ft+____L_--f t= 35 6.96 2.06 0.30 <br /> Total head: feet 40 8.91 2.64 0.39 <br /> 45 11.07 3.28 0.48 <br /> 3. Pump selection 50 13.46 3.99 0.58 <br /> 55 4.76 0.70 <br /> 3 <br /> A pump must be selected to deliver at least m � 0.82 <br /> 5.605.68 0.95 <br /> (1A or B)with at least__a)___feet of total head(2D) 65 <br /> 70 7.44 1.09 <br /> I hereby certify that 1 have completed this work in accordance with applicable ordinances, rules and laws. <br /> (signature) <br /> (license#) (date) <br />