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F-17 <br /> '�� <br /> i' PiTMP SEL.ECTION PROCEDURE <br /> FJ�D PERFOitAT10N OF A PERFORLTED LATERnL <br /> A. Determine pump capadty: w-� <br /> Gravity Distribution ..,.«� <br /> 1. Minimum suggested is 600 gallons per hour(l0 gpm)to stay ahead of ;:. �� . 'M w.N�w�,,k�,,,,,� <br /> wa ter use ra te. '`""�`"" ��°'"•�"°"" "'`""'° <br /> �.,�.,..,..,,e,.;' <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 , . ��;;�,�������^�^�" <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. ,,,;,,,� .;�-u�a., �Z•�e fe,. <br /> �e .i n�.u,K <br /> ... ...� � hrtiretlM�IO��IM al " . <br /> Pressuze Distibution � c��� '"""''"'•"' <br /> 3.a. Select number of perforated laterals�_ <br /> b. Select perforation spacing= 3 feet �:".�';,;�;K''"° <br /> c. Subtrad 2 ft from the rock layer length. <br /> ��-2 fG= 53 feet <br /> d. Deternune the number of spaces between perforaHons. <br /> I„eitgth �eSf.SpaCil►g=�_ft.+�_ft._�spaces Required Perforation Disch e <br /> e. �spaces+1 = 1� pezforations/lateral ��uo�p�a,in�ce�gp� <br /> f. Multiply perforations per lateral by number�of laterals to �H'�'d e ��.ap.� � ad�,, <br /> get total number of perforations.w� x ���a,,_, S�_perforations. �f�� <br /> g� � X�'d �gp� 1.Oa 0.56 0.74 <br /> SELECTED PUMP CA.PACTIY��- Q_gpm 2.��j �.8� 1.�4 <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 /> S 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�scharg� <br /> F.�.. = a.(. ft./100 ft of pipe � <br /> b. Determine total pipe length from pump to discharge E1c�avon DifFenncc� <br /> point Add 25 percent to pipe length for fitting p�,p �S <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 dmes pipe length= F-l8b <br /> 50 x 1.25= ('� feet <br /> 1.5 inch 2.0 inch 3.0 inch <br /> c. Calculate total friction loss by multiplying �, fr;a;�►«��ioon�rP;� <br /> friction loss in ft/100 ft by equivalent pipe length. <br /> Total friction loss= �-l. x L3 +100=�,_feet 10 0.69 0.20 <br /> -� 12 0.96 0.28 <br /> 4. Total head required is the sum of elevation difference, 14 1.28 0.38 <br /> spetial head requirements,and total fricdon loss. 16 1.63 0.48 <br /> 18 2.03 0.60 <br /> 20 2.47 0.73 O.11 <br /> �_+ S� +�_ 25 3J3 1.11 0.16 <br /> (1) (2) (3c) 30 5.23 1.55 0.23 <br /> 35 7.90 2.06 0.30 <br /> 4 11.07_ __ 2.64 0.39 <br /> TOTAL HEAD 13 feet 45 1a.73 3.28 0.48 <br /> 50 3.99 0.58 <br /> 55 4.76 0.70 <br /> C. Pump selection bo s.bo o.s2 <br /> ► 1. A pump must be selected to deliver at least <br /> ._.� ��gpm (Step A) with at least �� feet of total head (Step B). <br />