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PJ™l $T;L1;CTIQN ?RQC;QYRJ; <br />A. Determine pum, caplldty: <br />1. Minimum suggested is 600 gallons per hour 00 gpm) to stay ahead of <br />water use rate. <br />2. Maximum suggested !or deltftory to a drop box of a home system is 2.700 <br />gallons per hour (45 gpn) to paeffllt baild-up of pressure in drop box. <br />3. Use value from design of pressure distribution system. <br />SELECTED PUMP CAPAcrrt YD gpm <br />B. Ottenninl hnd nquJnmentll . <br />1. Elevation dl.ffama between pump and point of discharge. <br />I 0 feet <br />2. If pumping to a pressure distribution system, add ftve feet for pressure <br />required at manifold ~ , . <br />~feet <br />3. Prlction loss . <br />L Enter friction 1099 table with gpm Uld pipe diameter. <br />Read lriction loss iJl feet per 100 feet from page F-18. <br />P.L. • ~ . (... Y ft./100 ft of pipe <br />: b. Determine total pipe length from pump to discharge <br />point. Add 25 percent to pipe length for fitting <br />loss, or use a fitting loss chart. Equivalent pipe <br />length • 1.25 times pipe length • <br />•ltC> xl.25.• 13:if feet <br />c. Ca1culate total friction loss by multiplying <br />lric:tion loss in ft/100 ft by equivalent pipe length. <br />Total friction loss• I] )'( x c . (,,'-1 +100 • ......:± <br />4. Total head required is the sum of elevation dilfmei:ace <br />spedal head requirements, and total friction loss. <br />I (q. + s + y <br />(1) (2) (3d <br />TOTALHEAD as:: feet <br />feet <br />C. Pump selection . <br />1. A P'll!'P must be selected to deliver at least ..:i]_ gpm (Step A) with at least .A. feet of total head (Step B). <br />D. Total Pumpout Volume <br />1. To maximize pump life select sump size for 4 to 5 pump operations per day. . <br />?zoo gpd +_4 • !SD gallons per dose <br />2. Calculate drainback <br />1. Determine total pipe length, .1.LQ.. feet. <br />2. Determine liquid volume of pipe • ...J.i_gallons per 100 feet. (see page F-18) <br />3. Multiply length by volume: Orainback quantity • <br />..I..W2., feet x ...,lj( gallons/100 ft. ~ ...2Q.. gallons. <br />• Suggested drainback quantity is 10 peceut of pumped quantity. A larger drainback <br />percentage will decrmN pump station efficiency slightly but pumping energy costs are <br />usually a reJatively small part of the total household energy costs. <br />3. Total pump out volume equals dose volume + drainback <br />I £ 0 gallons per dose+ ~ 0 gallons • / 2 0 Total Gallons <br />F-15--., <br />Pi1'9Length <br />..... , --=-c---~Elffldan~.:::::~.:=r <br />F-18b <br />1-' inch 2.0inch 3.0inch <br />SPIii FrlcMa•,-tOOft.flt""9 <br />10 0.69 0.20· <br />12 0.96 0.28 <br />·14 1.28 0.38 <br />16 l.63 0.48 <br />18 2.03 0.60 <br />20 2.47 0.73 0.11 <br />25 3.73 1.11 0.16 <br />30 5.23 1.55 0.23 <br />35 7.90 2.06 0.30 <br />40 11.07 2.64 0.39 <br />45 14.73 3.28 0.48 so 3.99 0.58 <br />S5 4.76 0.70 ' . 60 S.60 0.82 . I ;' <br />D-7 <br />l!STIIIMTl!D Sf!IMIGI: P'\.OWS "" Gal.LONS l'1!Jt OAY <br />HUM9D TY"'1!!: 01" '"3100,C.: 0 <br />~ <br />2 <br />3 <br />" 9 • ., <br />• <br />t 11 m t:z <br />300 225 190 10"11, <br />'SO 300 z,e ., <br />l00 37' ~---In n!O 4!10 294 ~t • 900 9~ 332 ...... <br />10150 .• 600 :s70 or m 1200 ant 409 Colll,_ <br />E-_18a <br />diameser (inches) Oallons ,-100 feet <br />1 <br />1.25 <br />1.5 <br />2 <br />2.5 <br />3 <br />4 <br />4.4 <br />7.77. <br />10.58 <br />17.43 <br />24.87 <br />38.4 <br />66.1 ·