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. � �� m��� <br /> � � • � PUMP SELECTION PROC�DURE <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 /> distribudon device. . <br /> B. Pressure distribution <br /> See pressure distribution work sheet <br /> From A or B Selected pump capacity: �.� gpm rY►��• <br /> 2. Determine pump head requirements: <br /> A. Elevation difference between pump and point of discharge? � soii treotment system <br /> )� feet &poinf of discharge <br /> a;va�Q�:a':. /D t�.0 <br /> B. Special head requirement? (See Figure at right-Specinl Head Reguirements) total pipe <br /> �„ lengt <br /> feet (nlet � �.elevation <br /> C. Calculate Friction loss pipe ; <br /> difference <br /> : ------- -- -: <br /> . <br /> 1. Select pipe diameter a•� in ••�•-�------ •• <br /> -------------------------- ------���`� '� <br /> 2. Enter Figure E-9 with gpm (lA or B) and pipe diameter(C1). <br /> Read friction loss in feet per 100 feet from Figure E-9 Speciai Head Requirements <br /> Friction Loss = 3.� � 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 Piastic Pipe <br /> g s� feet x 1.25 = II � feet Per 100 feet <br /> 4. Calculate total friction loss by multiplying friction loss (C2) nominai <br /> in ft/100 ft by the equivalent pipe length (C3) and divide by 100. pipe diameter <br /> flow rate 1.5" 2" 3" <br /> - 3-� tf ft/100ft x J J � +100=�_ft pm <br /> D. Total head required is the sum of elevation difference (A),special 2� 2.47 OJ3 0.11 <br /> head requirements (B), and total friction loss (C4) 25 3.73 1.11 0.16 <br /> ) � ft+ '- ft+�`- _ft= 30 5.23 1.55 0,23 <br /> 35 6.96 2.06 0.30 <br /> Total head: 1 (� feet ao s.9� 2.6a o.39 <br /> 3. Pump selection a5 >>.o� s.28 o.aa <br /> 50 13.46 3,99 0.58 <br /> 55 4.76 0.70 <br /> A pump must be selected to deliver at least 4S vi mmAx. 60 5.60 0.82 <br /> (lA or B)with at least�_feet of total head (2D) 65 6.48 0.95 <br /> 70 7.44 1,09 <br /> I hereby certify that 1 have completed this work in accordance with applicable ordinances, .rules and laws. <br /> ��'-'� � ���----= (signature) 3�1�{ (license#) �--/o-01 (date) <br />