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F-17 <br /> PiJMP SELECI'ION PROCEDURE <br /> EW PERFORATION OF A PERFORATED LATERAL <br /> A. Determine pump capacity: �-�« <br /> Gravity Distribution r.,.a� <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of .-�.:-.;- - ' a�..N„w F,,,K,,,,a. <br /> water use rabe. � `""+s'�°`°'". I;�'�,°��;�,,.`°'"..' <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2�/W . MM�11on Or11Na�.o„�«��a��, <br /> �»� ,..a. .so <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. ..,;„w -., �p.� �:•�e �ao. <br /> la ol R«a Lq., <br /> . . . .. �VrWellwr lentW et <br /> Pressure Distibution ��^�� °i'""«"'•"' <br /> 3.a. Select number of perforated laterals 3 <br /> b. Select perforation spacing=.�_feeti �w���� ►,•w�r s�in.a <br /> BN�n PIWM 3�wd Le�r <br /> c. Sub 2 ft from the rock layer length. <br /> -�"2 ft._ �� feeti <br /> ��� <br /> d. Deternune the number of spaces between perforations. <br /> Length perf.spacing=2�ft.+�ft._�y_spaces Required Perfontion D�sch e <br /> e. �spaces+ 1 =,��perforations/lateral �+B�u°�'s P�a"7'�ce�gP� <br /> f. Muldply perforations per lateral by3number of laterals to DH��8e �2 ra�,,, � ad� <br /> get total number of perforations. W�„�� x �,< <�_ ��' perforations. �E�c> <br /> g� � X��''-�gP�� 1.Oa 0.56 0.74 <br /> SELEC TF.'D PUMP CAPACTIY�_gpm 2,�b �.g� 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 /> _�Z 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�P�L�B� <br /> Read friction loss in feet per 100 feet from table. Po�ni oC Discnargo <br /> F.L.= a.� f�/100 ft oE pipe �� T/�� <br /> b. Determine total pipe length from pump to discharge Elcvation Differencel <br /> point. Add 25 percent to pipe length for fitting p�p �� <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 times pi length= F-18b <br /> �x1.25 = `10�feet <br /> C. CalNlate total friCtion loSs b multi 1 n 1.5 inch 2.0 inch 3.0 inch <br /> Y P Y� 8 �, k;a;a,�.�i oo n�r P�a <br /> friction loss in h/100 h by equivalent pipe length. <br /> Total friction loss= a.°� x 0 +100=�_feet 10 0.69 0.20 <br /> �� 12 0.96 0.28 <br /> 4. Total head required is the sum of elevation difference, la 1.28 0.38 <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 /> aO +�_+ 1 � 25 3.73 1.11 O.16 <br /> (1) (2) (3c) 30 5.23 1.55 0.23 <br /> 35 7.90 2.06 0.30 <br /> 40 11.07 2.64. 0.39 <br /> TOTAL HEAD �'L feet 45 14.73 3.28 0.48 <br /> 50 3.99 0.58 <br /> 55 4.76 0.70 <br /> C. Pump selection 6o 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 />