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� . ' t F-17 <br /> PLJMP SELECTTON PROCEDURE <br /> EI�D PERFORATION OF A PERFORATED L,TERAL <br /> A. Determine pump capacity: ��� <br /> Gravity Distribution T� <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of ' '• ',;,,,a W,M�..F,e,k,,,,,,,- <br /> water use rate. Y_.�"�'S"°""` -"�''°' ""°"°'°'`""'° <br /> � w,s�.a,e..,oao..� <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 . _ ^•+«•��a��»�,�.,�^�°�h <br /> �»��.a. � <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. �,,.�,„ .'_.,�«., ,:•�o�aa <br /> o�a«.«.. <br /> . _ P.n«a�;.��ce�«a� <br /> Pressure Distibution ��^�� �°"°"'°'`°""' <br /> 3.a. Select number of perforated laterals � . <br /> � b. Select perforation spacing= � feet `�°'�.'�,,�,'`"° <br /> c. Sub�tra�y�2 ft.from the rock layer length. <br /> �- ��-2 ft._• L(e feet <br /> d. Deternune the number of spaces bet�veen perforations. <br /> Length perf.spacing=�l ft.+�ft._�spaces Required Perforation D�uh e <br /> e. �spaces+1=�perforations/lateral „ u+�°'+�P�II""°�e(gp"� <br /> f. Mulhply perforations per lateral by number of laterals to ��3a ��a8e �2�p,, i A�� <br /> get total number of perforations.�,3; x �„�Q,,_��perforations. ��c� <br /> g. � x�lz�_�BPm. 1.Oa �� 0.74 <br /> SELECT'ED PUMP CAPACITY�"L gpm 2.�b �.g0 1.�4 <br /> B.Determine head requirements: a.Use for single family homes <br /> 1. 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 loss <br /> a. Enter friction loss table with gpm and pipe diameter. �P��8�► <br /> Read friction loss in feet per 100 feet from table. Poinc of D�schargc <br /> F.L._ �• h./100 ft of pipe T/oo! <br /> b. Determine total pipe length from pump to discharge Elevation Difference I <br /> point. Add 25 percent to pipe length for fitting p�p 9q 3 <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 times pi length= F-18b <br /> �x 1.25=�o(o feet <br /> 1.5 inch 2.�inch 3.0 inch <br /> c. Calculate total friction loss by multiplying �, fr;a;a,i���oo$�r�;a <br /> friction loss in ft/100 h by equivalent pipe length. <br /> Total friction loss= a. x 100=�_feet 10 0.69 0.20 <br /> _� _1_QSe__-y 'i2 0.� o.2s <br /> 4. Total head required is the sum of elevation difference, 14 1.28 038 <br /> special head requirements,and total friction loss. 16 1.63 0.48 <br /> 18 2.03 0.60 <br /> 20 2.47 0.73 0.11 <br /> � + S + 3 25 3.73 1.11 0.16 <br /> (1) (2) (3c) 30 523 1.55 0.23 <br /> 35 7.90 2.06 0.30 <br /> 40 11.07 2.64 039 <br /> TOTAL HEAD �_feet 45 14.73 3.28 0.48 <br /> 50 3.99 0.58 <br /> 55 4.76 0.70 <br /> C. Pump selection bo s.bo 0.82 <br /> 1. A pump must be selected to deliver at least <br /> ?�i gpm (Step A) with at least ��feet of total head (Step B). <br />