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- . PUMP SELECTION PROCEDURE <br />.. . <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°/o greater than the water supplv 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 pressatre distribiction zvork sJzeet <br /> From A or B Selected pump capacity: `�'7' gpm <br /> 2. Determine pump head requirements: <br /> A. Elevation difference between pump and point of discharge? soil treotment system <br /> &point of discharge <br /> / � feet � a�Qa���e� <br /> B. Special head requirement? (See Figecre at right- Specic�l Hend Reqi�irements) totol pipe <br /> length <br /> S feet iNet�� ' ZAdifference <br /> G Calculate Friction loss pipe;; i;� <br /> � ------- <br /> ._ �_ <br /> � <br /> 1. Select pipe diameter �--� in ;�����������-������- ��� <br /> �- ; <br /> 2. Enter Figr.�re E-9 with gpm (lA or B) and pipe diameter (C1). "" ' "•° •" ` <br /> Read friction loss in feet per 100 feet from Fibaure E-9 Speciai Head Requirements <br /> Friction Loss= 3 -99 ft/100ft of pipe Gravity �istribution 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 /> �_feet x 1.2� = s g feet <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 /> = 3.! ft/100ft x 3� =100 = � ft fl pmrate 1.5" 2" 3" <br /> D. Total head required is the sum of elevation difference (A), special 2� 2.47 0.73 0.11 <br /> head requirements (B), and total friction loss (C4) 25 3.73 1.l 1 0.16 <br /> � S ft+ S ft+ Z ft= 30 5.23 1.55 023 <br /> Total head: �� feet 35 6.96 2.06 o.so <br /> 40 8.91 2.64 0.39 <br /> 3. Pump selection a5 >>.o� C� o.as <br /> 50 13.46 3.99 0.58 <br /> 55 4.76 0.70 <br /> A pump must be selected to deliver at least�gpm 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 t have c m eted this work in accordance with applicable ordinances, rules and laws. <br /> (signature) `� (license#) ��� ��� (date) <br />