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PUMP SELECTION PROCEDURE <br /> 1. Deterini ae pui-np 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 /> i <br /> B. Pressure distribution <br /> See pressure distribution work sheet <br /> From A or B Selected pump capacity: y., gpin <br /> 2. Determine-pump head requirements: <br /> A. Elevation difference between pump and point of discharge? soil treatment system <br /> kkfeet tic point of discharge <br /> B.Special head requirement? (See Figure at right- Special Head Requirements) total f,ipe <br /> 5 feet length <br /> inlet ' <br /> t. 2A,elevation <br /> C. Calculate Friction loss pipe .7 f difference <br /> 1. Select pipe diameter a. in <br /> " ------9122n <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 =��_ft/100ft of pipe Grayity 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 lengthet - <br /> = 9'' fe <br /> E-9: Friction Loss in Plastic Pipe <br /> feet x 1.25 1(0 <br /> 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 /> •t. ft/100ft x 11a! _=100= _(eft flow rate 1.5" 2" 3" <br /> pm <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 /> 1 S0 ft+_ ft+ (o ft= 30 5.23 1.55 0.23 <br /> Total head: a/t feet 35, 6.96 2.06 0.30 <br /> L- 40 8.91 2.64 0.39 <br /> 3. 'Fump selection 45 11.07 3.28 0.48 <br /> - 50 13.46 3.99 0.58 <br /> A pump55 4.76 0.70 <br /> must be selected to deliver at least_q�_gpm 60 5.60 0.82 <br /> (lA or B)with at least_ P,7 feet of total head (2D) 65 6.48 0.95 <br /> 70 7.44 1.09 <br /> 1 hereby certify that 1 hav com feted this work in accordance with applicable ordinances, rules and laws. <br /> (signature) _ E'1 (license#). 13 �-Q (date) <br />