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� � PUMP �ELECTION I'ROCEDURE <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 /> estaUlislunents at least 10%greater than the water supply rate, <br /> but no faster than the rate at wluch effluent will flow out of the <br /> disti-ibution device. <br /> L�. I'ressure distribution <br /> See pressure distribution work sheet <br /> From A or B Selected pump capacity: 3� gpm <br /> 2. Determin� pump heaci requireinents: <br /> A. Llevation difference Uetween pwmp and point of discharge? soil treatment system <br /> a a� feet &point of discharge <br /> Q:Ae°oo°:�e:. <br /> B. Special head requirement? (See Figure at right - Special Hend Requirements) total pipe �`�� <br /> � feet length <br /> inlet �'""'"�'"'"`�' 2A,elevation <br /> C. Calculate Friction loss ^ difference <br /> p�Pe _� <br /> , <br /> ------- -- -�. <br /> 1. Select i e diameter -> �' <br /> P P --�_-� ,........-�-� ---�-- � `�`t�' <br /> ;; <br /> -' ---------------------------- ------ <br /> _ 2. Enter Figure E-9 with gpm (lA or B) and pipe diameter (C1). <br /> Read friction loss n� feet per 100 feet from Figttre E-9 5pecial Head Requirements <br /> Friction Loss = �. la,� ft/100ft of pipe Gravity Distribution 0 ft <br /> 3. Detennine total pipe length from puinp discharge to soil treatment Pressure Distribution 5 ft <br /> discharge pouit. Estimate by adding 25 percent to pipe length for <br /> fitting loss. Total pipe length times 1.25 = equivalent pipe lei�gth <br /> �.��� feet x 1.25 -_ a,��} feet E-9: Friction Loss in Plastic Pipe <br /> 4. Calculate total friction loss by multiplying friction loss (C2) Per 10o feet <br /> nominal <br /> in ft/100 ft by the equivalent pipe length (C3) and divide Uy 100. pipe diameter <br /> _ �• fo ft/100ft x �`�`� =100 = $ ft ilow rate 1.5" 2" 3" <br /> pm <br /> Ia. 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.l 1 0.16 <br /> a S ft+ S ft+ � ft - 30 5.23 1.55 0.23 <br /> Total head: ��_�e�t 35 6.96 2.06 0.30 <br /> �__.._ <br /> 40 8.91 2.64'� 0.39 <br /> - ___,_ _ _ <br /> �. Pump �electioY� 45 11.07 3.28 0.48 <br /> ��,����� 50 13.46 3.99 0.58 <br /> A pump must be selected to deliver at least�pm 55 4J6 OJO <br /> lA or B wilh at]east 60 5.60 0.82 <br /> � ) �__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 /> 1�,�- .�' d <br /> �,,f�--__ ���, ��,,.: , .,_._.____. , <br /> (signature) .:" y (license#) _ f �-�,o-(�� (date) <br />