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03'f09/2010 01:28 7634975011 SPTESTINGINC PAGE 12f13 <br /> ' I <br /> PUMP SELECTION.PROCEDURE <br /> 1.1 Determine pump capacity: <br /> A.. Gravity distribution <br /> 1. Minimum required discharge is 10 gpm <br /> • <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 /> distribution device. <br /> A. Pressure distribution <br /> See pressure distribution work sheet <br /> F •om A or 13 Selected pump capacity: , o gpm <br /> 2. Determine pump head requirements: <br /> A Elevation difference between pump and point of discharge? sot treatment system <br /> 'r) feet &point of discharge <br /> B. Special head requirement? (See Figure at right-Special Head Requirements) . total .Ipe 'a !o•ri <br /> _feet lengi <br /> Inlet °'n'� ` � 2A.elevation <br /> C. Calculate Friction loss pipe j <br /> difference <br /> 1. Select pipe diameter_ 2a in2. Enter Figure E-9 with gpm(].A or B) and pipe diameter(C1). <br /> Read friction loss in feet per 100 feet from Figure E-9 <br /> r Special Head Requirements <br /> Friction Loss =_ .tr.''/ 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 /> `i feet x .1.25 = E-9: Friction Loss In Plastic Pipe <br /> I / 4e feet <br /> 4. Calculate total friction loss by multiplying friction loss (C2) Per 100 feel <br /> in ft/100 ft by the equivalent pipe length (C3)and divide b 100. nominal <br /> Y pipe diameter <br /> ft/1.00f1: l ) `rJ +1.00= . ft flow rate 1.5" 2" 3" <br /> gpm <br /> ' D. Total head required is the sum of elevation,difference (A),special 20 12.47 0.73 0.11 <br /> head requirements (8), and total friction loss (C4) 25 3.73 1,11 0.16 <br /> `7 ft+ "� ft+v _ft= 30 5.23 1.55 0.23 <br /> Total head: feet 35 6,96 2.06 0.30 <br /> - 8.91 � ' <br /> m .. ., .. ..�..,.�.�.- 40 2.64) 0.39 <br /> �„ m.a -.� <br /> 3. Pump selection 45 11.07 3.28 0.4a <br /> 50 13.46 3.99 0.58 <br /> A pump must be selected to deliver at least 40 55 4.76 0.70 <br /> gpm 60 5.60 0.82 <br /> (IA or 0)with at least feet of total head (21)) <br /> 65 6.48 0.95 <br /> .�. •• 70 7.44 1.09 <br /> I herby certify that I have conipl ted this work in accordance with applicable ordinances, rules and laws. <br /> i � s�gi'tature) 3 9 _(license 1) "7,Pa ( (date) <br />