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WAC( C U/ Pyl- U E S <br /> + PUMP SELECTION PROCEDURE <br /> 1. Determine pump capacity: <br /> A. Gravity distribution <br /> I. Minimum required discharge is 10 gpm <br /> 2. Maximum suggested discharge is 45 gpm. For other <br /> 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 -- ' <br /> See pressure distribution work sheet ` <br /> From A or B Selected pump capacity: `4 gpm <br /> 2. Determine pump head requirements: soil treatment system <br /> A. Elevation difference between pump and point of discharge? &point f ischorge <br /> feet total pipe <br /> B. Special head requirement? (See Figure at right - Special Head length <br /> Requirements)_ inlet pipe <br /> elevation <br /> feet pipe difference ii <br /> C. Calculate Friction loss . <br /> 1. Select pipe diameters in ........................... <br /> 2. Enter Figure E-9 with gpm (lA or B) and pipe diatheter <br /> (Cl) -ffGravity <br /> Head Requirements <br /> Read friction loss in feet per 100 feet frbin Figure E-9 istribution 0 ft� _Friction Los$t� ft/100ft of pipe Distribution 5 ft <br /> 3. Determine tbtatpipe length from pump discharge to soil treat- <br /> ment discharge point. Estimate by adding 25 percent to pipe length E-9:Friction Lou in Plastic Pipe <br /> for fitting loss. Total pipe len th times 1.25 = equivalent pipe length Per 100 feet <br /> ,7< feet x 1.25'= _feet <br /> nominal <br /> 4. Calculate total friction loss by multiplying friction loss (C2) pipe diameter <br /> in ft/100 ft by the equivalent pipe length (C3) and divide by 100. flomrate 1.5^ 2^ Y <br /> ft/100ft x !`W +100 = eft 20 2.47 0.73 0.11 <br /> D. Total head required is the ssum of elevation difference (A), s �� <br /> 0 6- <br /> special head requirements (B), and total friction loss (C4) 30`J � 5.23 1.55 1.11 ,+0.2311 r <br /> _ft + S ft+ 1, u ft = 35 6.96 2.06 0.30 <br /> ;1',,lt%; 8.91 ,;''2.64` '_.0.39' <br /> Total head: _ fo :o fCet' 11.0 3.28 o.4a <br /> -- 50 13.46 3.99 0.58 <br /> C�C__t�7S.. .�F '`.�. 4:76'`=-0:70". <br /> 3. Pump selection bo s.b0 o.a2 <br /> A pump must be selected to deliver at least `7 (��pm 6.48 o.95 <br /> 0A or B) with at least Q v feet of total head (2D) 70 7.44 1.09 <br /> I hereby certify khat I have completed this work in accordance with applicable ordinances, rules and laws. <br /> (signature) I `1 (license#) ` -51 (date) <br />