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• <br /> PUMP SELECTION PROCEDURE <br /> All boxed rectangles must be entered,the rest will be calculated. <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 <br /> For other establishments at least 10%greater than the water <br /> supply rate,but no faster than the rate at which effluent will flow <br /> out of the distribution device. <br /> B. Pressure Distribution-see pressure design worksheet leato nt hstem <br /> &pt' acarge <br /> Ott <br /> Selected Pump Capacity: 29 gpm total pipe <br /> length <br /> 2A.elevation <br /> Inlet • ' difference <br /> 2. Determine head requirements: PPG FSI <br /> A. Elevation difference between pump and point of discharge. i <br /> 8 feet <br /> mnrrf+»r3++rr <br /> B. Special head requirement?(See Figure-Special Head Requirements) <br /> 5 feet Special Head Requirements <br /> Gravity Distribution Oft <br /> C. Friction loss Pressure Distribution 5ft <br /> 1. Select pipe diameter 2 in <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 E-9 Friction Loss in Plastic Pipe <br /> Friction loss= ( 1.55 ft/100 ft of pipe per 100 ft <br /> nominal <br /> 3.Determine total pipe length from pump discharge to soil system discharge point. Flow Rate pipe diameter <br /> Estimate by adding 25 percent to pipe length for fitting loss. gpm 1.5" 2.0" 3" <br /> E•uivalent • • length times 1.25=total pipe length 20 2.47 0.73 0.11 <br /> 25 ft x 1.25= 31.25 feet 25 3.73 1.11 0.16 <br /> 30 5.23 1.55 0.23 <br /> 4.Calculate total friction loss by multiplying friction loss(C2) 35 6.96 2.06 0.3 <br /> by the equivalent pipe length(C3)and divide by 100. 40 8.91 2.64 0.39 <br /> FL= 1.55 ft/100ft X 31.25 ft / 100. 1.0 feet 45 11.07 3.28 0.48 <br /> 50 13.46 3.99 0.58 <br /> D. Total head requirement is the sum of elevation difference(A),special 55 4.76 0.7 <br /> head requirements(B),and total friction loss(C4). 60 5.6 0.82 <br /> 8 ft + 5 ft + 1.0 ft 65 6.48 0.95 <br /> 70 7.44 1.09 <br /> Total Head: 14.0 feet <br /> 3. Pump Selection <br /> 1.A pump must be selected to deliver at least 29 gpm(1A or B) <br /> with at least 14.0 feet of total head(2D). <br /> I hereby certify that I have completed this work in accordance with all applicable ordinances,rules and laws. <br /> (signature) 810 (license#) 5//7/v3 (date) <br /> Page 1 of 1 <br />