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PUMP SELECTION PROCEDURE <br /> 1. Determine pump capacity: <br /> A. Gravity distriUution <br /> 1. Minimum required discharge is 10 �m <br /> 2. Ma�:unum suggested discharge is 45 gpm. For other <br /> establishrrtents at least 10°o greater than the water suppl�� rate, <br /> but no faster than the rate at���hich effluent��ill f1o��� out of the <br /> dist��ibution device. <br /> B. Pressure distribution <br /> See pre�sit�•e clist��ibution zval•k slzeet <br /> From A or B Selected pump capacity: � gpm <br /> 2. Determine pump head requirements: <br /> A. Elevation difference bel-�Teen pump and point of discharge? soil treatment sysTem <br /> &point of dischage <br /> ��-feet �°'�°�'°3 <br /> B. Special head requirement? (See Figiire at r•ig12t - Sp��ei��l H�ad Pt���iiireme�ifs) fiotai pipe <br /> _ length <br /> � teet 2A.elevation <br /> inlet �"'-'����' difference <br /> C. Calculate Friction loss p�p� � <br /> - ----- -- -= <br /> 1. Select pipe diameter!�_in �� � <br /> :; ---------------------------- ------ <br /> 2. Enter Figicre E-9 with gpm (lA or B) and pipe diameter (C1). � <br /> Read fricrion loss in feet per 100 feet from Fiaure E-9 Special Head Requirements <br /> Friction Loss = 3•:�--F ftJl00ft of pipe Gravity Dfstribution 0 ft <br /> 3. Determu�e total pipe lenath from pump discharge to soil treatment Pressure Distribution 5 ft <br /> discharge point. Estimate by addu�g 25 perceFlt to pipe length for <br /> fittuzg loss. Total pipe length times 125 = equivalent pipe length E-4: Friction Lass in Piastic Pipe <br /> ��feet x 1.25 = � � feet Per 100 feet <br /> 4. Calculate tvtal friction loss by multiplying friction loss (C2) nomina! <br /> in ft/100 ft by the equivalent pipe length (C3) and divide by 100. piAe diameter <br /> = 3•�� ft/100Et x 3 l�( =100 =�__ft flo�mrate 1.5" 2" 3" <br /> D. Total head required is the sum of elevation difference (A), special 2� 2.47 0,73 0.11 <br /> head requirements (B), and total friction loss (C4) 25 3J3 l.l 1 0.16 <br /> ��ft + _5"� ft+__�_1__ft = 30 5.23 1.55 0.23 <br /> Total head: _�fee# 35 6.96 2.06 o.so <br /> 40 8,91 2.64 0.39 <br /> 3. Pump selection 45 >>.o� 3.28 o.4s <br /> 50 13.46 3.99 0.58 <br /> 55 4.76 0.70 <br /> A pump must be selected to deliver at least �x-. gpm 60 5.60 0.82 <br /> (lA or B) w�ith at least �feet of total head (2D) 6� 6,q8 0.95 <br /> 70 7.44 1.09 <br /> I hereby certify that f have rnmpleted this rv�c>rk in accor�fance witii applicable ordinances, rules and laws. <br /> {signature) _(license#) {aate) <br />