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PLJMP SEL,ECTION PROCEDL�tE <br /> A. Determine pump capacity: <br /> \' Gravity Distribution END PERfORATION OF q pERFORATED LATERAL <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of ��„p�„N <br /> water use rate. ;�---•- <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 ,�D`���.---17� <br /> gallons per hour(45 gpm) to prevent build-up of pressure in drop box. '`�,�my�„��w, �" �oyK��c�o�.ru�. iubrk(w�ar- <br /> �.Muh Iqer ol Aoy a sira.corer.e <br /> . �rit��rotln poperl <br /> er or e a y'-"' Wrlaalbn Dr11Md tlwlrcn�olly <br /> Pressure Distribution 7 �r+�`��� r„o P r,�o� uP <br /> 3. a. Select number of perforated laterals 3 �•�+�� , � -u ua�, ,2•,0�aa. <br /> o MI qa . .,�• ol Rock laym <br /> b. Select perforaHon spacing=�_ft. ' `,� ,., `P«iaoii�;:'�,�.e a� <br /> c. Subtra t 2 ft. from the rock layer length. c�p�s«�a ►�,», 8���«^�������� <br /> ��-2 ft. = l,�(�ft. <br /> abi�i sou P.�..ir s�.�nw <br /> BHon PbcMq sand loyar <br /> d. Determine the number of spaces between perforations. <br /> Length perf.spacing= �(o ft.+ ? ft.= a a, S�CeS TAB[.E OF PERPORATION DISCtiARCES IN GPM <br /> e 2� spaces+ 1 =�_perforations/lateral <br /> ' f. Multiply perforations per lateral by number of laterals to Head Perforationdiameter(inches) <br /> get total number of perforations. <br /> �� x < <�_�_perforations. ��p ��� <br /> 1.Oa OS6 0.74 <br /> S• � X=-� _�gPm• �s 0.69 0.90 <br /> P�' 6P'" P� 2.06 0.80 1.04 <br /> 2S 0.89 1.17 <br /> SELECTED PUMP CAPACITY 3 m 3.0 0.98 1.28 <br /> -.�.gP 4.0 �.�3 t.a� <br /> 5.0 ].26 ].65 <br /> B.Determine head requirements: <br /> aUse 1 A foot of head for residential syslems. <br /> l. Ele��ation difference between pulnpand poi�lt of dischar�e. buse2Af�cofheadforocheres�abl;shmen�s <br /> `z� feet <br /> 2. If pumping to a pressure distribution system,add five feet for pressure <br /> required at manifold <br /> 5� feet <br /> 3. Friction loss Pipe Length <br /> a. Enter friction loss table with gpm and pi�diameter. � Point oC Disch�c <br /> Read friction loss in feet per 100 feet from table. �g <br /> F.L. _ �-io ft./100 ft of pipe Eleva�ion Di[fcrence <br /> b. Determine total pipe length from pump to discharge p„r„P n��J <br /> point. Add 25 percent to pipe length for fitting <br /> loss,or use a fitting loss chart. Equivalent pipe F-18b <br /> length-1.25 times�ipe length= 1.5 inch 2.0 inch 3.0 inch <br /> ,�_X 1.2$ _�Z f�t gPm Friaion I«a per 10o ft o[pipe <br /> c. Calculate total friction loss by multiplying 10 0.69 0.20 <br /> friction loss in ft/100 ft by equivalent pipe lcngth. 12 0.96 0.28 <br /> Total friction loss= % .lo x �Z +�00=�_feet 14 1.28 0.38 <br /> ��. Total head required is t}ie sum of clevation differcnce, 16 1.63 0.48 <br /> 18 2.03 0.60 <br /> special head requirements,and total friction loss. 20 2.47 0.73 0.11 <br /> 2S 3.73 1.11 0.16 <br /> _�+�_+ 2 30 523 1.55 0.23 <br /> (1) (2) (3c) 35 7.90 2.06 0.30 <br /> 40 11.07 2.64 0.39 <br /> 45 14.73 3.28 0.48 <br /> TOTAL HEAD _�_feet 50 3.99 0.58 <br /> SS 4.76 0.70 <br /> 60 5.60 0.82 <br /> C. Pump selection <br /> � 1. A pump must be selected to deliver at least gpm (Step A) <br /> with at least_15'� feet of total head (Step B). <br />