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PUMP SELECTION PROCEDURE <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 /> distribution device. <br /> B. Pressure distribution <br /> See pressure distribution work sheet <br /> From A or B. Selected'pump capacity: a. gpm <br /> 2. Determine pump head requirements: i i i o <br /> A. Elevation difference between pump and point of discharge? soil treatment system <br /> aa feet & .'Int of discharge <br /> B. Special head requirement?(See Figure at right-Special Head Requirements) total •pe <br /> le • <br /> 5 feet2A.elevation <br /> Inlet ,: ,` difference <br /> C. Calculate Friction loss pipe <br /> 1. Select pipe diameter a•0 in I' , cS, <br /> ti <br /> 2. Enter Figure E-9 with gpm(1A or B) and pipe diameter(C1). <br /> Read friction loss in feet per 100 feet from Figure E-9 Special Head Requirements <br /> Friction Loss= I.4 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 E-9:Friction Loss in Plastic Pipe <br /> D.00 feet x 1.25 = �iJ feet 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 /> = 1.4 ft/100ft x x.50 +100= ft gpm <br /> flow rate 1. " 2" 3" <br /> D. Total head required is the sum of elevation difference(A),special 20 2.47 0.73 0.11 <br /> head requirements.(B),and total friction loss (C4) 25 3.73 1.11 0.16 <br /> .-X4, ft+ ft+ 4 ft= 30 5.23 -1755 _0.23 <br /> 35 6.96 2.06 0.30 <br /> Total head: 1 I feet 40 8.91 2.64 0.39 <br /> 45 11.07 3.28 0.48 <br /> 3. Pump selection 50 13.46 3.99 0.58 <br /> 55 4.76 0.70 <br /> A pump must be selected to deliver at least a al gpm 60 5.60 0.82 <br /> (1A or B)with at least 2 ) feet of total head (2D) 65 6.48 0.95 <br /> 70 7.44 1.09 <br /> I hereby certify that I hay completed,this work in accordance with applicable ordinances, rules and laws. <br /> . --"---40 ‘,--- <br /> (signature) 3"y (license#) L- b 4-03 (date) <br />