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- �� � PUMP SELECTION I'ItOCED�JRE ` <br /> - 1. Deterr�nine pump capacity: <br /> ,�A. Gravity distribution <br /> � 1. Minimum req.uired discharge is 10 gpm _ <br /> 2. Maximum suggested'discharge is 45 gpm. For other � <br /> establishments at least 10°/a 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 work sheet <br /> From A or B Selected'pump capacity: 3 q gpm <br /> 2. Determine pump head requirements <br /> A. Elevation difference between pump and point of discharge? sop tteatment system <br /> I � feet &point of discharge <br /> � ?�� <br /> B. Special head requirement?(See Figure at right-Special Head Requirements) �tal p(pe <br /> 5 feet � 2A.elevation <br /> inlet difference <br /> C. Calculate Friction loss pipe <br /> ------- -- - <br /> 1. Select pipe diameter �•v in •---•---•--•- •• q�3 <br /> --------------------------- ------. <br /> 2. Enter Figure E-9 with gpm(lA or B)and pipe diameter(Cl). <br /> Read friction loss in feet per 100 feet kom Figure E-9 Special Head Requirements <br /> FricHon Loss= a� ft/100ft of pipe , Gravity Distribution 0 ft <br /> 3. Determule total pipe length from pump discharge to soil treatment Pressure Distribution 5 ft <br /> discharge point.Eskimate 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 /> �� feet x 1.25 = 31 a feet <br /> Per 100 fest <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. plpe dlameter <br /> flow rate 1.5" 2" 3" <br /> _ �.to ft/100ft x 31� +100= � ft pm <br /> ' D. Total head required is the sum of elevation difference(A),special � 2:47 OJ3 0.11 <br /> head requirements (B),and total friction loss (C4) 25 3.73 1.11 016 <br /> �_ft+ 5 ft+ � ft= . 30 5.23 1.55 0.23 <br /> Total head: _ . 35. 6.96 2.06 0.30 <br /> �� feet qp 8.91 2.64 0.39 <br /> 3. Purnp selection � a5 �i.o� s.2s o.a8 <br /> 50 13.46 3.99 0.58 <br /> 55 4J6 OJO <br /> A pump must be selected to deliver at least 3aj gpm bp 5.60 0.82 <br /> (lA or B)with at least�_feet of total head (2D) �5 6.48` 0.95 <br /> 70 • 7.44 1.09 <br /> I hereby certify that I have completed this work in accordance with applicable ordinances, rules and laws. <br /> �� �� ��"~-'-'-' (signature) 3"�� (license#) I v-11.�v� (date) <br />