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Detormine pump capadipr <br /> I. Minimum suggested Is 600 gallons 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 2.700 <br /> gallons per hour(43 gpm)to prevent build-up of p esstrre in drop box. <br /> 3. Use value from design of pRsture distribution iystem. <br /> SELECTED FVMF CAFACiTY &Q _aPat � t.eh�dl <br /> r, �w 4 <br /> B.Determine head requirements POW <br /> 1. Elevation difference between pump and point of dLsdtarge <br /> ._,�_feet E11Z P1ah�aden btlftx� <br /> required at manifold <br /> 2. If pumping t0 a pressure (0 <br /> system,add Ave Feet for pntesure (o�1� <br /> �..� `�� <br /> _.._feet P-11b <br /> 3. Friction loss 1.3 trhdr 2.0 inch 3.0 6 <br /> a. Enter friction loss table with gpm and pipe diameter. 3a t� '°'imVW 100n'tt'+' <br /> Read friction bss In feet per 100 feet from��R18. p� to 0.69 0.20• <br /> F.L S ft./100 R of pipe 2�� 12 0.96 0.23 <br /> ' b. Determine total pipe length from pump to discharge <br /> int. Add 2S 16 1.� 0.45. <br /> po percent to pipe length for Atting l3 2.03 0.60 <br /> loss,or use a fitting loss chart. Equivatentpipe, 20 2.47 0.73 0.11 <br /> I length-IM times pipe length a 3 3 g0.1t <br /> 30.:11�"L <br /> , ._x 11S O tlyfeet 0.25 <br /> C. <br /> Calculate total friction loss by multiplying 40 11.01 264 0.35 <br /> friction loss In ft/100 R by equivalent pipe length. 45 14.73 3.23 0.4t <br /> Total friction loss. /,ZS- x /.� ,10a s .O feet ss 4.6 0iG <br /> 4. Total head required is the sum of-eleva-tion d1frere e, 60 1.60 0.11 <br /> i I I special head requirements,and total friction loss. <br /> a <br /> TOTAL HEAD feet <br /> C. Pump selection <br /> 1. A pump must be selected to deliver at least 3_gpm (Step'A)with at least b-7 <br /> M_feet of total head(Step 0). no It nohf• 0 aULORS rt <br /> nrc <br /> D. Total Fumpout Volume «� r � 1XI <br /> 1. To maximize pump life select sump size for 4 to S pump operations per day. "s too wo tie <br /> - gpd+4• gelloro per dose e - •00 ;" 1911 <br /> 2. Calculate drainback • soo S" 334 <br /> 1. Determine total pi length,loo feet. _ ' IOSO - too uo <br /> Pipe 6"�► ....� • floe ars �o• <br /> 2. Determine liquid volume of piper_gallons per 100 feet. (see page F-18) <br /> F-18a <br /> 3. Multiply length by volume: Drainback quantity• <br /> '0 feet x JZgallons/100 ft. m./74 llons. <br /> •Suggested drainback quantity is 10 percent of pumped quantity. A larger drainback <br /> percentage will decrease pump station of clency slightly but pumping energy costs ate 1.25 7,77 <br /> usually a relatively small part of the total household energy costs, <br /> 3. Total pump out volume equals dose volume+drainback �---� 17 <br /> L!3 �pllons per dose 12 galloo Total Gallons 2•5 24.8• <br /> 3 38.4 <br /> ` 66.1 <br /> t1 h u2 ., <br />