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� � <br /> F-17 <br /> PL�SELEC?TO?`T PROCEDURE <br /> ENp PERFORA770N OF A PERfOAGTED L+TE'ntL <br /> A. Determine pump capacity: ��-v»� <br /> Gravity Distribution .a,.�,� <br /> ]. Minimum suggested is 600 gallons per hour(70 gpm)to stay ahead of _ � - <br /> le�.r a G.e«nw FaaK(a�ei- <br /> water use rate. �"�'S'�°""` '�:'a'.::.,�:,;'°'`""'° <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 ,, , �M•�������_�^�^�� <br /> .,»� ,.... � <br /> gallons per how(45 gpm)to pre�ent build-up of pressure in drop box. ",.�,,„ .'_w 1.,., ,2•„<<a. <br /> e FM�a ol Raca lq.r <br /> � P.r*waMn lxe»e at <br /> Pressure Distibuhon ��^�� �""""`•'"°' <br /> 3.a. Select number of perforated laterals� <br /> b. Select perforation spacing=�_feet L��500 ���r 5ci10 <br /> B��VMaeO�•a lo�er <br /> c. Subtrast 2 h.from the rock layer length. <br /> S S _2 ft.- S� feet <br /> ��re�u <br /> d. Deternvne the number of spaces between perforations. <br /> Length perf.spacing=�ft.+�ft._�spaces Reyuired per{onoon Diuh e <br /> e. �spaces+1 =_L�{_perEorations/lateral �8��P��1Ute�SPr� <br /> f. Muldply perforations per lateral by numbe�of laterals to �d8e �Zm�p,, ` ma� <br /> get total number of perforations. „�� x �„ ,�_�perforations. �f�� <br /> g ,� X�„P,,,-�gP� l.�d �.56 �.74 <br /> SELECTED PUMP CAPACTTY�gpm 2.�b �.g� 1.04 <br /> B.Determine head requirements: a. Use for single family homes <br /> l. Elevation difference between pump and point of discharge. b.Use for all other applications <br /> �_feet <br /> 2. If pumping to a pressure distribution system,five feet for pressure <br /> required at manifold if gravity system,zero. <br /> �_feet <br /> 3. Friction]oss <br /> a. Enter friction loss table with gpm and pipe diameter. RP�L�g� <br /> Read friction loss in feet per 100 feet from table. � ' Poine of D'uchugc <br /> F.L._ �•ey ft./100 ft of pipe �/of! <br /> b. Determine total pipe length from pump to dixharge Ele�ation Difference <br /> point. Add 25 percent to pipe length for fitdng p�,�, _9z <br /> loss,or use a fitting loss chart. Equivalent pipe p <br /> length-1.25 times pipe length= F-18b <br /> I 1S x 1.25= )S l. feet <br /> c. Calculate total fricdon loss b multi 1 n 1.5 inch 2.0 inch 3.0 incn <br /> Y P Yl S gpm r-.�a;�i«.�i oo n or Q�a <br /> friction loss in ft/100 h by equivalent pipe length. <br /> Total friction loss= �,t��x )Sl� =100=�_feet j2 0.96 0.28 � <br /> 4. Total head required is the sum of elevation difference, 14 1.28 038 <br /> special head requirements,and total friction loss. 18 2_3 Q� i <br /> 20 2.47 0.73 0.11 <br /> �_+ � +�_ :S 3.73 1.11 0.16 <br /> (1) (2) (3c) 30 5.23 1.55 0.23 � <br /> 35 7.90 2.06 ; 030 � <br /> 40 11.07 2.64 0.39 I <br /> TOTAL HEAD �� feet 45 14.73 3.28 0.48 <br /> 50 3.99 0.58 <br /> 55 4.76 U.70 ! <br /> C. Pump selection 6o s.6o 0.82 <br /> 1. A pump must be selected to deliver at least <br /> t� gpm (Step A)with at least aS feet of total head(Step B). <br />