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PUMP SELECTION PROCEDURE <br /> 1. Determine pump capacity: <br /> -,:A. Gravity distribution <br /> 1. Miniinum'required discharge is 10 gpm <br /> 2. Maximum suggested'discharge is 4S gpm. For other <br /> establishments atleast 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: L 2 gpm <br /> 2. Determine pump headrequirements: <br /> A. Elevation difference between pump and point of discharge? soil treatment system <br /> &point of discharge <br /> Li l7 feet W1°-gig:; I a t <br /> B. Special head requirement?(See Figure at right-Special Head Requirements) total pipe <br /> Iengt <br /> feet ''' <br /> N"' 2A.elevation <br /> inlet ' difference <br /> C. Calculate Friction loss <br /> PIP • <br /> i <br /> 1. Select pipe diameter' -) •-% in ,q <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 /> 7, Vft 100ft of pipe Gravity Distribution 0 ft <br /> Friction Loss / p p pressure Distribution 5 ft <br /> 3. Determine total pipe length from pump discharge to soil treatment r <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 /> 3(.0.S/ feet x 1.25 = 1-461( feet - Per 100 feet <br /> 4. Calculate total friction loss by multiplying friction loss (C2) nominal <br /> in ft/100 ft,by.the equivalentpipe length(C3) and divide by 100. pipe diameter <br /> flow rate 1.5" 2" 3" <br /> = 3. ce ft/100ft x L 6`L +100= 10 ft gpm <br /> D. Total head required isthe 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 /> 4 D. ft+ ft+ ) 30 5.23 1.55 0.23 ft= 35 6.96 2.06 0.30 <br /> Total head: a 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 L-1 9 gpm 60 5.60 0.82 <br /> (1A or B)with at least to feet of total head (2D) 65 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) :::,..7 1-1 (license#) e L) ,C.7-:: (date) <br />