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F-17 <br /> PLT�tP�ELECTIO'�1 PROCEDURE <br /> Elp PERFORATION OF A PERFOitATED L4TEF4L <br /> A Determine pump capadty: ��-�^-•, <br /> Gravity Distribution T�� <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of _ . . � -- <br /> loy�/of LeeM.�Qw Fabk(a eui- <br /> water use rate. � `.�.'S"'`"�` �`""�. '°°' °'""�' <br /> .�,�,.�.a..,,�..;�, <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 . , �;;�„���;p��_°^�°�^ <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. .;�,;Rw -u �ro.� �2•�o�a�. <br /> o� fM10 0/ Ra�lq.r <br /> . Prlorot{ar LocoteA al <br /> Pressure Distibution - �,..,s,,,,,,,. 8.��«�.�.,�, <br /> 3.a. Select number of perforated laterais�_ <br /> b. Select perforation spacing= y,s feet e�.;r ow�a�;,a°S,b�,;;,"1N° <br /> c. Su�t�r,act 2 ft from the rocic laver]ength. <br /> �-�-2 ft._�_feet, <br /> d. Deter�mine the number of spaces bet�veen perforations. <br /> Length perf.spacing=�ft.+�.�ft._��spaces Requucd Perforabon Dischazg e <br /> e. �Q spaces+ 1 = aL_perforations/lateral in gallons per minute(gpm) <br /> f. Multiply perforadons per lateral bv number of laterals to ��3y D�schazge _ �� � <br /> get total number of perforations.-�-- x ��,����„_�_perforations. He j 3z m ° md°d <br /> 4S x�. _y m. ,..��. <br /> �� -� �„�+-�-SP <br /> 1.Oa 0.74 <br /> SELECT'ED PUNIP CAPACITY�_gpm 2.�Yj �.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 /> _�feet <br /> 2. If pumping to a pressure distribution system,five feet for pressure <br /> required at manifold if gravi�ystem,zero. <br /> ;eet <br /> 3. Friction loss ^v <br /> a. Enter friction loss table�vith gpm and pipe diameter. p�P�L�B� <br /> Read friction loss in feet per 100 feet from table. � Point of Dischargc <br /> F.L.= 3•S. ft./IOOftofpipe T°�y�. <br /> b. Determine total pipe length from pump to discharge Elevation Difference I <br /> point. Add 25 percent to pipe length for fitting pti,mp �r?� <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 times pipe length= F-18b <br /> 17c� x1.25 = al"� feet <br /> C. CdlCulate tOtal friCtiOn 1055 b multi 1 n 1.5 inch 2.0 inch 3.0 inch <br /> Y P Y� g � �;a;m i«.�ioo rt�r p;a <br /> friction loss in ft/100 h by equivalent pipe length. <br /> Total friction loss= �l 3 x Z.,b y100=_�feet l0 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 /> special head requirements,and total friction loss. 16 1.63 o.a8 <br /> 18 2.03 0.60 <br /> 20 2.47 0.73 0.11 <br /> �_+�_+ `c� 25 3.73 i.l l 0.16 <br /> ��� /.,� ��_, zn �.�; 1 Sc ��� <br /> • � ,. , � ..'� 1 <br /> yij ._ ... _. �I�;�: <br /> TOTAL Ij�-1D _�feet 45 ]a.73 3.28 0.48 <br /> - 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 a�feet of total head (Step B). <br />