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^ <5* t^/1 •' ^ ,;/ >' <-F -" >; <br />B. <br />P'JMP SI- . PROCED'JRE <br />A. Deter:nine pump capacitv <br />1. Minimum suggested is 600 gallons per hour CIO spm^ - <br />to stay ahead of water »•: race <br />2. Maximum suggested for d .ive . ;o a dro^' box of a here <br />system is 2700 gallon,-. *. ' ■ gpv to prevent <br />buildup of pressure 1. .rup <br />3. Use value from des,Lgn ; or • ■ j- ib'.cion system <br />SELECTED PUMP CAPACITY ... . . . . . . . . . . . . . . <br />Determine head requirements; \j\ <br />7X5- <br />1 . <br />2. <br />3. <br />r-1 . . ^Ei« 'arion dirference between pump and point of dis>. ;ar;:e <br />If pumping to a pressure distribution sy,«ten, add 5 feet <br />” pressure requirea at manif-ald............................................ <br />Friction loss ~ <br />a. Enter friction loss table with gpm and pipe diameter. <br />Read rriction loss in feet per 100 feet from page F-l.R <br />F. L. * 5? ft/100 ft <br />b. Deter. ^.,e total pipe length f. om pump to discharge <br />point. Add 25 percent to pipe lenu'h for fitting <br />loss, or use a fit:in,» loss chart. Enuivalent nine <br />gpm <br />fee <br />2> feet <br />length r l.‘r^» ch = I .•</o o <br />CJoIlu^jco ijr.il fricl'ioTi lo:;s by I c i p i v im; <br />rricLiofi loss fr/lOO ■ (. ny oquiv.ilenc pine <br />U-»n;zrh . <br />Z25'Total friction loss <br />Total haad required is the sum cf elevation difference, <br />.special head requirements, and total friction loss. <br />_____X -___51__+ 7 <br />TOTAL HEAD....................................................................' . . '..................... <br />/<T5 f -ot <br />y .feet <br />/9. 7 fa <br />C. Pump selection <br />1. A pump must be selected to deliver at least 7S • S <br />with at least 7 feet of total head. <br />gpm <br />D.To rtu.\imizc pump life ssl..*'‘t sump site for 4 to 5 pump <br />operations per day. <br />'■.ilcuL.atc drainb.i'k <br />kh- <br />5«iV <br />•ft .V <br />'^Z <br />\ <br />•r: ■ <br />M- <br />1. Determine tot."., n i.pe lengtli. <br />2. <br />3. <br />^ f ee c - <br />/7. V? gallons perDetermine 1. id voLu.me o: pip'. <br />100 feet. !jce ^-18) <br />Multiply length l-v volume: Drainback quantity = <br />/ ^ O feet X / 7. 3 gallons/'no ft » _ _/ 7 93 gallons <br />Suggested drn irtac-c. quantity is 10 percent of pump '. quantity. <br />A larger drainback percentage •will decreasa pump station <br />efficiency slightly but o-umping e-ergy costs are usually a <br />relacivel/ s-^ia 11 part of the total household enersy costs-