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� . F-17 <br /> PUMP SELECTTON PROCEDURE <br /> OJD PERFOR4TWM OF A PERFORATED LATERAL <br /> A. Determine pump capacity: ��.,., <br /> Gravity Distribution �' T„�,,, ��y <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of _ '� - <br /> wateruserate. ����""+s"°'°�'. � ��b:a�;:�"�" <br /> � w�s,.e,wn cen.., <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 . , ►••,'••�,���«d�,���M <br /> Ma coo war xo <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. �.,.,u„ ;_.,�.,., ,2•,.Ea„ <br /> e�a«.�,,.. <br /> Pressure Distibution � c�..�s.�.,,,� `�'"°�""'"���°� <br /> BOI�M1 N I.q�MI <br /> 3.a. Select number oE perforabed laterals 3 . <br /> b. Select perforation spacing=�_feet �",�„�,.,;�+� <br /> c. Su�b�2 h.from the rock layer length. <br /> �--�-2 ft._. (�(o feet <br /> d. Deternvne the number of spaces bet�veen perforations. <br /> Length perf.spacing=�ft.+�ft._�spaces (iequued pe�fOration Diuha:ge <br /> e. �spaces+1= �� perforations/lateral �+�p�a+�+��e cspm► <br /> f. Multiply perforations per lateral b number of laterals to �� '� �Se <br /> Z`'� a <br /> g' �t total number of perforations. ,,�� x 3���_��perforahons. �� � ��""� <br /> "��=�.'L 8P� <br /> 1.Oa 0.56 0.74 <br /> SELECI'�.'D PUMP CAPACITY��gpm 2.Ob �.8� 1.�4 <br /> B.Determine head requirements: a.Use for single family homes <br /> 1. Elevarion difference between pump and point of discharge. b.Use for all other applications <br /> �L feet <br /> 2. If pumping to a pressure distribution rystem,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. � Pipc Lengtt► <br /> Read friction loss in feet per 100 feet from table. ` Poinc of Dischargc <br /> F.L._ :t• !o h/100 ft of pipe <br /> b. Deternvne totai pipe length from pump to discharge IIevaaon Diffeitnce� <br /> poin� Add 25 percent to ripe length for fitting �p _ ��� <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 ames pipe length= F-18b <br /> 1 S� x 1.25= 1 4S� feet 1.5 inch 2.0 inch 3.0 inch <br /> c. Calculate total friction loss by multiplying � �;Q;Q,�,���R,��;� <br /> friction loss in ft/100 h by equivalent pipe length. <br /> Total friction loss= a�(� x ! �5� +100= S feet 10 0.69 0.20 <br /> '12 0.96 0.28 <br /> 4. Total head required is the sum of elevation difference, 14 1.28 038 <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 /> �_+_�+_� 25 3.�3 1.11 0.16 <br /> (1) (2) (3c) 3U 5.23 1S5 0.23 <br /> 35 7.90 2.06 0.30 <br /> TOTAL HEAD a L_feet � 11.07 2.64 0.39 <br /> 45 14.73 3.28 0.48 <br /> 50 3.99 0.58 <br /> C. Pump selection 6o s 60 0 82 <br /> � 1. A pump must be selected to deliver at least <br /> ��gpm (Step A)with at least a�feet of total head(Step B). <br />