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.� , <br /> PUMP SELECTION PRO ED mR <br /> o+o �ow►raN oF n �-roaaTm u�nt. <br /> A. Debermine pump capadty: � �� <br /> Gravity Distribution T� <br /> 1. Minimum suggested is 60p gallons per hour(10 gpm)to stay ahead of • - . <br /> wateruserate. �.._.•:���.. �.",�.,p:w,..:.i`°"°'°'- <br /> �;;.., _. . <br /> 2. Maximum suggeswed for delivery to a drop box of a home system is 2,700 . _ . � ��,,.,,,,,,,.,4 <br /> gallons per hour(45 gpm)to prevent build-up of pressure in dmp box. ,�.,, ���� <br /> ,c:.�.,.:;.:.:.-- . ' <br /> Pressure Distibution v ��' "�'°�°'"��„ <br /> • �:; w.�.w u,� e.n..«i.a�. <br /> 3.a. Select number of perforated]aterals <br /> b. Select perforation spacing= fee� :���•�..��.�.+ . <br /> c. Subtract 2 ft from the rnck]ayer length. <br /> �-2 k.= feet � <br /> d. Determine the number of spaoes between perforations. TABLB oF P&RFORAtION DL9C�IARGFS 1N GPM <br /> Length perf.spacing= k.+ ft.= spues � pe�atjon eta�ta(�nd,ea> <br /> e. spaces+1= perforaHons/lateral <br /> f. Multiply perforations per lateral by number of laberals to '�„ '/. <br /> get total number of perforations. �� x��= perforations. i,p, o� 0�4 <br /> g' � "-r-r�' g�'m. �s o.� 090 <br /> s.a� o.eo �.04 <br /> SELECTED PUMP CAPACTTY a_�gpm u a.a9 i.l� <br /> 3A 0.98 l,Zg <br /> 4A 1.13 1,4� . <br /> B.Determine head requirements: 5A i.26 i,6s <br /> 1. Elevation difference between pump and point of discharge. <br /> LY feet aUse IA foot of hasd fos msidential�yste�s, <br /> bUx 20 ket of head for othu establis2�a►ents <br /> 2. If pumping to a pressure distribudon system,five feet for pressure <br /> required at manifold if gravity system,zero. <br /> _ � feet <br /> 3. Friction loss a�� <br /> a. Enter friction loss table with gpm and pipe diameter. � P;pe Leag�h q,�8�g <br /> Read friction loss in feet per 100 feet from table. <br /> F.L._ ,33 ft,/100 ft of pipe Point of Discharge <br /> b. Determine total pipe length from pump to discharge 9`�5 <br /> point. Add 25 pereent to pipe length for fitting 7� Ele�ation Differenoe <br /> loss,or use a fitting loss chart. Equivalent pipe 9 38 P"'r'p <br /> length-1.25 times pipe length= <br /> �$�x 1.25= 3 SO feet F-18b <br /> c. Calculate total friction loss by multiplying 1.5 inch 2.o;nch 3.0 inch <br /> friction loss in ft/100 ft by equivalent pipe length. � ������aPiP` <br /> Total friction loss= �50 x ,33 +100=_ /� feet. l0 0.69 0.20 <br /> 4. Total head required is the sum of elevation difference, 12 0.96 0.28 <br /> 14 1.28 0.38 <br /> special head requirements,and total friction loss. 16 1.63 0.48 <br /> 18 2.03 0.60 <br /> /0.5 +�_+_ � `'j 20 2.47 0.73 0.11 <br /> __�___ J.3._ i.ii o.i6 <br /> �i� (Z) (3c) 30 5.23 1.55 0.23 <br /> 35 7.90 2.06 030 <br /> TOTAL HEAD 3 � feet � 11•07 2•64 a•39 <br /> 45 14.73 3.28 0.48 <br /> SO 3.99 OS8 <br /> C. Pump selection ss 4:76 0.�0 <br /> 6o s.6o o.s2 <br /> 1. A pump must be selected to deliver at least �-��"'a� '-" 3.73 �7 <br /> ' Z-- ? J�` 1�5 <br />�. �gpm (Step A)with at least 3/ feeE of Eotal head(Step B). 5; a'7 -�- • <br /> ._._. 3 Q �. �. �3 <br /> Z X <br /> � - ' x= �� <br /> 37 ? _ �, 33 <br />