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PUMP SELECTION PROCEDURE <br /> Determine pump capacity: <br /> :. 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 <br /> uppjy rate, but no faster than the rate at which effluent will flow <br /> ui (A the distribution device. <br /> 1=, Pressure distribution <br /> _`-)4.111 pressure distribution work sheet <br /> i`roua Ci or B Selected pump capacity: gpm <br /> . Determine pump head requirements: soil treatment system <br /> &point of discharge <br /> A. Elevation difference between pump and point of discharge? vt p .�4 <br /> -feet total pipe <br /> B. Special head requirement? (See Figure at right - Special HLad ,length__ <br /> l�ri�llirc'rrients) 2A.elevation <br /> .i inlet difference <br /> ._feet pll� <br /> C. Calculate Friction loss 1. Select pipe diameter in ---------------------" ------ <br /> 2. Enter Figure E-9 with gpm (1A or B) and pipe diameter _ - <br /> �t_'7) Special Head Requirements <br /> head friction loss in feet per 100 feet from Figure E-9 Gravity Distribution 0 ft <br /> l riction Loss = - Of ft/100ft of pipe Pressure Distribution 5 ft <br /> : . <br /> 'e[ermine total pipe length from pump discharge to soil treat- <br /> nient discharge point. Estimate by adding 25 percent to pipe length E-9:Friction Loss in Plastic Pipe <br /> for fittin T loss. Total pipe length times 1.25 = equivalent pipe length per loo feet <br /> feet x 1.25 = _feet nominal <br /> -� ----- <br /> 4. Calculate total friction loss by multiplying friction loss (122) pipe diameter <br /> i 1"t/100 ft by the equivalent pipe length (C3) and divide by 100. pmrate 1.5" 2" 3~ <br /> =100 = _ft 20 2.47 0.73 0.11 <br /> D. Total head required i the sum of elevation difference (A), <br /> sp�.cial head re9uirements (B), and total friction loss (C4) 30 5.23 1.55 0.23 <br /> rr ( ft + ft+ 3 ft = 35 6.96 <5'" 0.30 <br /> 45 11.07 3.28 0.48 <br /> Total head: feet 50 13.46 3.99 0.58 <br /> 3. Pump selection 60 5.60 0.82 <br /> A pump must be selected to deliver at least gpm 65 . 6.48 0.95 <br /> (1A or B) with at least _feet of total head (2D) 70 1 7.44 1.09 <br /> I hereby certify that I have completed this work in accordance with applicable ordinances, rules and laws. <br /> (signature) �7 (license#) (date) <br />