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A. Determine PUMP capacitr. <br />1. Minimum suggested is 600 gallon per hour (10 gpm) to stay ahead of <br />water use rate. <br />2. Maximum suggested for delivery to a drop box of a home system is 2700 <br />gallons per hour (45 gpan) to prevent build-up of ptew re in drop box. <br />3. Use value from design of pressure distribution swtem. <br />SELECT > LMW CAFAMY _':�c Spm <br />B. Determine head sequirementst <br />1. Elevation difference between, PUMP and point of diKharge. <br />2. If pumping to a pressure distribution system, add five feet for pressure <br />required at anwo*fold , <br />_5_ feet <br />3. Friction loss <br />a. Enter friction loss table with gpm and pipe diameter. <br />Read friction las in feet per 100 feet from page F-18. C <br />F.L a Z S -5 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 lentath • <br />x 1. , feet <br />c. Calculate total friction las t;y multiplying <br />friction loss in h/100 h by equivalent pipe length. <br />Total friction loss a_ x / , s 5- «100 a feet <br />4. Total head required is the sum of elevation difference, <br />special head requirements, and total friction loss. <br />�9 <br />(1) (2) (311 _ <br />TOTAL HEAD feet <br />C. Pump selection <br />I . A pump must be selected to deliver at least _ gpm (Step A) with at least <br />feet of total head (Step 9). <br />D. Total Puatpout Volute <br />I. To maximize pump life select sump size for 4 to 5 pump operations per day. <br />gpd + 4 a /i 3 gallons per dose <br />2. Calculate drainback <br />1. Determine total pipe length. A, o feet. <br />2. Determine liquid volume of pipe, / 7 `,, gallons per 100 feet. (see page F-18) <br />3. Multipiy length by volume.. Drainback quantity <br />C, (� feet x / L. L gallons/ 100 ft. • /7 , { gallons. <br />Su98ested drainback quantity is 10 percent of pumped quantity. A larger drainback <br />percentage will decrease pump station efficiency slightly but pumping energy costs am <br />usually a relatively small part of the total household energy, costs. <br />3. Total pump out volume eyuais dose volume + drainback <br />/l,.2--Qallons per dose + / % gallons a _ / C Total Gallons <br />Pipe LAngth <br />Point of D <br />F1es►atioa Diflereitce <br />EZZ-- <br />F-18b <br />1.3 isr h 2.0 inch 3.0 inch <br />1FM nis Pa 100 ft of + <br />10 <br />0.69 <br />0.20- <br />2_ <br />12 <br />0.% <br />0.28 <br />s <br />.14 <br />1.211 <br />0.38 <br />• <br />16 <br />1.63 <br />0.48 <br />7 <br />18 <br />2.03 <br />0.60 <br />e <br />20 <br />2.47 <br />0.73 <br />0.11 <br />2� <br />3.73 <br />1.11 <br />" :6 <br />5.23 <br />4-W;> <br />33 <br />7.90 <br />L06 <br />0.30 <br />40 <br />11.07 <br />L64 <br />0.39 <br />43 <br />14.73 <br />3.211 <br />0.48 <br />50 <br />3.99 <br />0.58 <br />35 <br />4.76 <br />0.70 <br />60 <br />5.60 <br />0.82 <br />D-7 <br />0 a.a.Loas r <br />Of +cseceNce <br />2 <br />300 <br />maid , <br />Z" <br />300 <br />I b <br />2_ <br />4w <br />777 <br />:,a <br />Ise <br />s <br />73o <br />470 <br />no <br />• <br />Ow <br />327 <br />332 <br />7 <br />1090 <br />f00 <br />370 <br />e <br />1200 <br />ars <br />4" <br />1.25 <br />7. <br />1.5H <br />2_ <br />1 <br />2.5 <br />2e <br />3 <br />3� <br />4 <br />F� <br />