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•' N <br /> Deto-mine pump eapadtjn <br /> I. Minimum suggested is 600 gallons per hour(10 gym) to stay ahead of <br /> water use tate. 41 <br /> . <br /> i 2. Maximum suggested for delivery to a drop box of a home system is 2.700 <br /> gallons per hour(45 gprn)to prevent build-up of pressure in drop box. ' <br /> 3. Use value from design of prtssuretribudo -te:zr. <br /> SHUCIBD FUW CAPA�C <br /> Spm <br /> B.Determine head requlrementtr -- f <br /> 4. Elmdon difference betvreas� r <br /> ump and point of dt dh gr- 0a+•allotr feet bat <br /> 2. 1f pumping to a pressure budon syalrnn,add Ave feet for prmnre <br /> required at manifold <br /> fee! is=iAti <br /> 3. Friction loss l.5 Inch Lo h+ch <br /> a. Enter friction loss table with gpm and pipe diameter. ] 5 tinea A40144 bwr loo <br /> Read friction loss in feet per 100 feet from page F-18. 10 0.69 0.20• <br /> F.L:=;«it./100 R of pipe `-+u 12 0." 0.21 <br /> b. Determine total pipe length from to dlsclhar •14 1.21 0.31 <br /> PuMp be 16 1.63 0.41 <br /> point. Add 25 percent to pipe length for fitting to 2.03 0.60 <br /> loss,or use a fitting loss chart. Equlvalentpipe 20 2.47 0.73 <br /> length-1.ZS times 1.11 <br /> V, '_length• 1.23 <br /> %;-6-x 1.Z'3 07�.�feet 7.90 2.06 <br /> C. Calculate total friction loss by multiplying �' 11.07 J-3r,; <br /> friction loss in ft/100 ft by equivalent pipe length. T J0 14.73 3.28 <br /> 3.49 <br /> Total friction Ions 4 /G x,� ,�. ?.100• �• feet 4.76 <br /> 4. Total head required Is"sum of elevation dlfr'eretxe, 60 <br /> special head requirements,and total friction loss. <br /> TOTAL HEAD �r7 =feet <br /> ' C. Pump selection <br /> 1. A pump must be selected to deliver at least V Pm (Slep'A)with at!east D"7 <br /> -/feet of total head (Step B). asttr�rto stt*eea3 ►toeee In slue <br /> i '� 1e ttirt a npioz <br /> D. Total Pumpout Volume ' ' ]pr� n r- <br /> 1. To maximize pump life select sump size forte 5 pump open dons per day. ;. : mss.- <br /> • � �� gpd 4®m ' .I.A5 ,gallons per dose '�' - `no.: 4" it <br /> "0 �� �= <br /> 2. Calculate drainback s <br /> � t I oro trop � <br /> 1. Determine total pipe length,Q-$ <br /> fed. <br /> 2. Determine liquid volume of pipe,I>- gallon per 100 feet. (see page F-18) F-18A <br /> 3. Multiply length by volume. Dralnback quandty o <br /> JJS•!eet x./1Z•5yallons/100 ft.• c gallons. ®'°'"� o'W <br /> • 4. <br /> Suggested drainback quantity'.>10 percent of pumped quantity. A larger drainback 1.2 7. <br /> percentage will decteasa pump station efficiency slightly but pumping energy costs aro 5 <br /> usually a relatively small part of the total household enssV costs. 1.$ <br /> 3. Total ur,p out volume equals dose volume+drainback ` 5 <br /> _)_„,_gallons per dose+ =gallons Total Gallons 3 <br /> • 4 6( <br />