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PUMP SELECTION PROCEDURE <br /> 1. Determine punip capacity: <br /> , A. Gravity distribution <br /> 1. Minimum required discharge is 10 gpm <br /> 2. Maximum suggsted discharge is 45 gpm. For other <br /> establishments a least 10%greater than the water supply rate, <br /> but no faster tha the rate at which effluent will flow out of the <br /> distribution dev e. <br /> B. Pressure distribution <br /> See pressure distribution work sheet <br /> From A or B Selected pump capacity: .9 gpm <br /> 2. Determine puntp head requirements: <br /> A. Elevation difference,between pump and point of discharge? soil treatment system <br /> i `r feet &point of WT1TA 70 J <br /> B.Special head requireinent? (See Figure at right-Special Head Requirements) total pipe <br /> r feet : - _ leng <br /> - ,y^ 2A.elevation <br /> , <br /> inlet ``av' difference <br /> C. Calculate Friction lo$s pipe <br /> 1. Select pipe diameter -4 m <br /> 19 <br /> 2. Enter Figure E-9 With gpm(1A or B)and pipe diameter(Cl). ~# --`=-- <br /> Read friction loss in feet per 100 feet from Figure E-9 Special Head Requirements <br /> Friction Loss= ii,9 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 /> '2. feet x 1.25 = (, feet E-9:Friction Loss in Plastic Pipe <br /> Per 100 feet <br /> 4. Calculate total friction loss by multiplying friction loss(C2) <br /> nominal <br /> in ft/100 ft by the equivalent pipe length(C3) and divide by 100. pipe diameter <br /> = 1•Li ft/100ft x to<. +100= 1 ft flow rate 1.5" 2" 3" <br /> gpm <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 /> LI ft+ S ft+ / ft= 30 5.23 1.55 0.23 <br /> Total head: feet 35 6.96 2.06 0.30 <br /> head: <br /> .. ._ 40 8.91 2.64 0.39 <br /> 3. Pump selection 45 11.07 3.28 0.48 <br /> 50 13.46 3.99 0.58 <br /> 55 4.76 0.70 <br /> A pump must be selected to deliver at least a `?' gpm 60 5.60 0.82 <br /> (1A or B)with at least ao feet of total head (2D) 65 6.48 0.95 <br /> ._ .... ._ 70 7.44 1.09 <br /> i <br /> I hereby certify that I have c9mpleted this work in accordance with applicable ordinances, rules and laws. <br /> Orili <br /> -_--.- (signature) 3/11 (license#) q-Jai-30itJ (date) <br />