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� � F-17 <br /> PUMP SELECTTON PROCEDURE <br /> F!O PERFORAT!(kd OF A PERFORATED LATERAL <br /> A. Determine pump capacity: �.�.v... <br /> Gravity Distribution T.,..,, <br /> 1. Minimum suggested is 600 galluns per hour(10 gpm)to stay ahead of _ . - - <br /> �Lo�f ol GMNnw faMlc(ar fa!- <br /> ��Lam7 Sad Lul� .MrA ler�N�nI s Nro.cwwW <br /> water use rate. ' -�a....,,e,.., <br /> 2. Maximum suggest�ed for delivery to a drop box of a home system is 2,700 . _ �•���,�»a���^����r <br /> .,»��.a, t� <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. c,,;q,„ ,-�-.,�.�., �:•�o_a,. <br /> +.�e or n«.ur•• <br /> . ' Prr�aarar lew�w et <br /> Pressure Distibution ���� �°"~^°""�°' <br /> 3.a. Select number of perforated laterals 3 . <br /> b. Select perforation spacing=.�_.feet °"°'"°'�°u^'�'"�""° <br /> e.+..w.a,.sa�,�,,., <br /> c. Su�btr�a�2 ft.from the rock tayer length. <br /> �--- ��-2 f�=�c.jo_feet <br /> d. Determine the number of spaces between perforarions. <br /> Length pesf.spacing=�ft.+ Z. ft._�Z spaces Required Pafonaon Diuhazge <br /> e. �_spaces+1= a.3 perforations/lateral �� in gallocu per atinute(gpm) <br /> f. Multiply perforations per lateral by number of laterals to ?�32 ���e <br /> Head %�3z�P'' y"°'�'' <br /> get total number of perfora�ons. ,-�,�,-, x��_,(,�perforations. ��� <br /> g- � x r���_.�$p�- <br /> 1.Oa � 0.74 <br /> SELECTED PUMP CAPACTTY�_gpm Z.�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 ali other applications <br /> �_feet <br /> 2. If pumping to a pressure distribution system,five feet for pressure <br /> required at manifold if gravity s stem,zero. <br /> �Y feet <br /> 3. Friction loss <br /> a. Enter friction loss table with gpm and pipe diameter. �Pe L�B� <br /> Read friction loss in feet per 100 feet from table. Poinc of Dischar e <br /> F-L._ '�.le f�/100 ft of pipe �� T/ua�s�i <br /> b. Deternune total pipe length from pump to discharge Ete�arion Differrnce I <br /> point. Add 25 percent to ripe length for fittins p�p 9�� <br /> loss,or use a fitting loss chart. Equivalent pipe � <br /> length-1.25 times pipe length= F-18b <br /> �x 1.25= � I� feet . <br /> c. Calculate total friction loss b multi lvin 1.5 inch 2.0 inch 3.0 inch <br /> Y P. K � k�a;m ica��oo n ar��� <br /> friction loss in ft/100 h by equivalent pipe length. <br /> Total friction loss= a���x I 1 3 +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 1.28 038 <br /> Special head requirements,and total friction loss. 16 1.63 0.48 <br /> 18 2.U3 0.60 <br /> 20 2.47 0.73 0.11 <br /> �_+�_+ � 25 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 /> ?OTAL HEAD aD feet � 14 73 3.3 0.48 <br /> 50 3.99 0.58 <br /> 55 4.76 0.70 <br /> C. Pu.mp selection 6o s.bo o.s2 <br /> 1. A pump must be selected to deliver at least <br /> _�gpm (Step A)with at least �o feet of total head (Step B). <br />