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� PUMP SELECTION 1'ROCEDURE <br /> 1. Determine pump capacity: �Qa 1`�1`S`� �� <br /> , - -.A. Gravity distribution <br /> 1. Minimum required discharge is 10 gpm <br /> 2. Maximum suggested discharge is 45 gpm. For other <br /> estaUlishments 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 /> di.sttibuHon device. <br /> B. Pressure distribution <br /> See pressure distribution work sheet <br /> From A or B Selected pump capacity: a .5 gpm <br /> 2. Determine pump head requirements: Ma�,,�-�� <br /> A. Elevation difference between pump and point of discharge? �a,,o seiF#re�i�er�t�system <br /> _ � feet - &pa(�#,e�drselYarge <br /> a� ar�_. <br /> B.Special head requirement?(See Figure Qt right-Special Head Requirements) totol pipe <br /> '-- feet lengt <br /> inlet .� 2A•elevation <br /> G Calculate FricHon loss difference <br /> pipe . <br /> ------- -- - <br /> 1. Select pipe diameter�_iri .................... .. <br /> ' --------------------------- ---93.C� <br /> _ 2. Enter Figure E-9 with gpm (1A or B) and pipe diameter(Cl). <br /> Re.ad friction loss in feet per 100 feet from Figure E-9 Special Head Requirements <br /> Friction Loss= I 'L 1 ft/100ft of pipe Gravity Distribution 0 ft <br /> 3. Determia�e total pipe length h-om puinp discharge to soil treahnent Pressure Distribution 5 ft <br /> discharge point. Estimate by adding 25 percent to pipe length for <br /> fitting loss.Total pipe length times 125=equivalent pipe length <br /> 1 o feet x 1.25 = t 3 feet E-9: Friction Loss in Plastic Pipe <br /> 4. Calculate total friction loss by multiplying friction loss (C2) Pe���feet <br /> nominal <br /> in ft/100 ft by the equivalent pipe length(C3) and divide by 100. pipe diameter <br /> = I� l �, ft/100ft x�_+100=�_ft tlow rate 1.5^ 2^ 3^ <br /> pm <br /> D. Total headxequired 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 0.16 <br /> _ �� ft+ - ft+- � ft= 30 5.23 1.55 0.23 <br /> Total head: � feet 35 6.96 Z.ob o.so <br /> 40 8.91 2.64 0.39 <br /> 3. Pump selection 4� >>.o� s.2s o.as <br /> 50 13.46 3.99 0.58 <br /> 55 4.76 0.70 <br /> A�pump muslt be selected to deliver at least��m bp 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 khat I ha�completed this work in accordance with applicable ordinances, rules and laws. <br /> ��C�- �'. �::'�._...._...�._ <br /> (signature) � (license#) __/U- � � C�� (date) <br />