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PUMP SELECTION PROCEDU <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%greeter 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: 40 gpm <br /> 2. Determine pump head requirements: <br /> A. Elevation difference between pump and point of discharge? son treatment system <br /> l feet & int of I charge <br /> B. Special head requirement?(See Figure at right-Special Head Requirements) total ipe <br /> len <br /> feet inlet 2A.elevation <br /> C. Calculate Friction loss pipe difference <br /> 1. Select pipe diameter a in - <br /> 2. Enter Figure E-9 with gpm(1A or B)and pipe diameter(Cl). <br /> Read friction loss in feet per 100 feet from Figure E-9 Special Head Requirements <br /> Friction Loss= -Lt-4 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 /> 20E-9.feet x 1.25 = 3�� feet E-9.Friction Loss in Plastic Pipe <br /> Per 100 feet <br /> 4. Calculate total friction loss by multiplying friction loss(C2) <br /> nominal <br /> in-ft/100 ft-by the equivalent pi a length(0)and divide by 100. pipe diameter <br /> LO ft/100ft x +100= /0 ft flow rate 1.5" 2" 3" <br /> m <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 4{ ft+ .5, ft+ /z ft= 30 5.23 1.55 0.23 <br /> 35 6.96 2.06 0.30 <br /> Total head: a 9 feet 40 8.91 2.64 0.39 <br /> 3. Pump selection 45 - 11.07 3.28 0.48 <br /> 50 13.46 3.99 0.58 <br /> 4.76 0.70 <br /> A pump must be selected to deliver at least � c� gpm 6 565 5.60 0.82 <br /> (1A or B)with at least _feet of total head (21)) 65 6.48 0.95 <br /> 70 1 7.44 1.09 <br /> I hereby certify that I have c mpleted this work in accordance with applicable ordinances, .rules and laws. <br /> (signature) (license#) _S'/1-D 2- (date) <br />