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PUMP SELECTION PROCEDURE <br /> 1. Determine pump capacity: <br /> A. Gravity distribution <br /> ;h Minimum required discharge is 10 gpm <br /> 2. Plaximum 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 zvork sheet <br /> From A or B Selected pump capacity: �� gpm <br /> 2. Determine pump-head,requirements: <br /> A. Elevat;on difference between pump and print of discharge? soil treatment system <br /> &point of discharge <br /> feet <br /> B. Special head requirement? (See Figure at right-Special Head Requirements) total pipe <br /> length <br /> feet2A. elevation <br /> inlet -� 40 difference <br /> C. Calculate Friction loss pipe < <br /> 1. Select pine diameter .in - <br /> -------------- ------------- ----- <br /> 2. Enter F1'8-ure E-9 wi.h g-prn t1A or B) and pipe diameter(Cl). <br /> Read fricrion loss in feet per 100 feet fro i Figure E-9 Special Head Requirements <br /> Friction Loss = 2-d C' ft/100ft of pipe Gravity Distribution 0 ft <br /> 3. Determine total pipe length from pump discharge to soil treatmen< Pressure Distn Fulfions 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 E-9: Friction Loss in Plastic Pipe <br /> Ga feet x 1.25 = 1&5 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 (0) and divide by 100, pipe diameter <br /> flow rate 1.5" 2" 3" <br /> -� ft/100ft x -100= C>,2, ft pm <br /> D. Total head required is the sum of elevation difference (A),special 20 2.47 0.73 0.11 <br /> head "B), and total fri tion loss (C4) 25 3.73 1.11 0.16 <br /> i + S� ft i-_ � f t= 30 5.23 1.55 0.23 <br /> 35 6.96 �2, <br /> 0b 0.30 <br /> Total head: �--?.� -feet 40 8.91 4 0.39 <br /> �. Pump selection 45 11.07 3.28 0.48 <br /> 50 13.46 3.99 0.58 <br /> / 55 4.76 0.70 <br /> A pump inu�t be selected to deliver at least -�S 9 m 60 5.60 0.82 <br /> (lA or 13) with at least/ feet of total head (2D) 65 6.48 0.95 <br /> 70 7.44 1.09 <br /> t h by - rtify that I have ompleted this worl.;n accordance with applicable ordinances, rules and laws. <br /> 9 i <br /> (signature)/ 2 (license#) 7 !/ (1 (date) <br />