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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: yo gpm <br /> 2. Determine pump head requirements: <br /> A.Elevation difference between pump and point of discharge? soil treatment system <br /> W-� feet & f c1targe <br /> B.Special head requirement?(See Figure at right-Special Head Requirements) total <br /> feet <br /> inlet 2A.elevation <br /> C.Calculate Friction loss difference <br /> 1. Select pipe diameter a in <br /> --------------------------- ----- 4� <br /> 2. Enter Figure E-9 with gpm(IA 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= a�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 /> E-9:Friction Loss in Plastic Pipe <br /> Sf S feet x 1.25= feet 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 /> -1� ft/100ft x a31 -1-100= (� 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 /> :9 ft+ _ft+_-(0-ft= 30 5.23 1.55 0.23 <br /> Total head: 4 D feet 35 6.96 2.06 0.30 <br /> 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 /> A pump must be selected to deliver at least 4 0 Qvm55 4.76 0.70 <br /> 60 <br /> (1A or B)with at least '1Ofeet of total head (2D 5,60 0.82 <br /> ) 65 5.60 0.95 <br /> 70 7.44 1.09 <br /> I hereby certify that I have completed this work in accordance with applicable ordinances, rules and laws. <br /> �� -----� (signature) �S (license#) Ste=0 c9 (date) <br />