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. .. . �JI�iP SELECTION PROCEDURE <br /> A. Determine pump capadty: <br /> Gravity Distribution END PERFORATION OF A PERFORA7ED LATERAL <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of �--c,,..c,�., <br /> water use rate. <br /> Topwll -� <br /> 2. Maximu��n�s�ugges livery to a drop box of a home system is 2,7(?0 , <br /> �.,loyer of Geoiutil� FaDrlc(u tar- <br /> gallons r hour(4�gpm) prevent build-up of pressure in drop box. ��mY so� �Y.. -��„��,a,.�.o,�,y,..,.,,<<a�,, <br /> >,.,,�«a .o.����� <br /> ,, <br /> er or I o e a Perlo�otion Orilled Horitonlolly <br /> Pressure Distribution • • ���o p �ar Top <br /> �/�Fut A1 Leasl 12�lo Edqt <br /> 3. a. Select number of perforated ]aterals ` ; F��e q«k� .,:••' o� r�k �r�, <br /> b. Select perforation spacing= ft. � ' ` P.;raa,io��'���.a o� <br /> c. Subtract 2 ft.from the rock layer length. _ <br /> � Cl�an Sond l.oytr Boi�om ol Lateral <br /> Y�-�-z Ir _ --ft. . , . ._ , <br /> Oripinol Soll Properly Scarilitd <br /> � &(ore Plocl�p Sard Loyer <br /> d. Determine the number of spaces between perforations. <br /> Length perf.spacing=- ft.d Et.- s�aces TABLE OF PERFORATION DISCHARGFS IN CPM <br /> e. �-spa�-1 - --- perforations/lateral <br /> ' f. Mulriply perforaHons per lateral by number of laterals to Head Perforation diameter(inches) <br /> get total number of perforations. <br /> ��`�"x ---�-��- --perforations. ��" ��' <br /> 1.0a OS6 0.74 <br /> 7 S 0.69 0.90 <br /> g' �gP,,,-r-►�r=�--gPn'' 2.ob a.so �.oa <br /> 2S 0.89 1.77 <br /> 3.0 0.98 1.28 <br /> SELECTED PUMP CAPACITY gpm Y�d}JZ. 4.0 1.13 t.a� <br /> 5.0 1.26 1.65 <br /> B.Determine head requirements: <br /> aUse 1.0 foot of head for residential systems. <br /> 1. Elevadon difference between pump and point of discharge. bUse 2.o E�c ot head for oct,er estabtuhn,encs <br /> ��feet <br /> 2. If pumping to a pressure distribution system,add five feet for pressure <br /> required at manifold <br /> - feet <br /> 3. FriCtion loss Pipe Length <br /> a. Enter friction loss table with gpm and pipe diameter. � Poin�of D;scharge <br /> Read friction loss in feet per 100 feet fro�n table. � `�I.p <br /> F.L._ ,�� ft./100 ft of pipe Elevation Difference <br /> b. Determine total pipe]ength from pump to discharge Pump SS,� <br /> point. Add 25 percent to pipe length for fitting 3 � � <br /> loss,or use a fitting loss chart. Equivalent pipe F-18b <br /> length-125 rimes pipe lcn�th = <br /> 1.5 inch 2.0 inch 3.0 inch <br /> ��x 1?5 =��(�feet gpm Friaion lou per 100 ft of pi�e <br /> c. Calculate total friction loss by multiplying 10 0.69 0.20 <br /> friction loss in ft/100 ft by equi��alent pipe length. 12 0.96 0.28 <br /> Total friction loss= ? .� f- x /S� �100=_�feet 14 1.28 038 <br /> •S. Total head required is the sum of elc�•ation difference, 16 1.63 0.48 <br /> 18 2.03 0.60 <br /> special head requirements,and total friction loss. 20 2.47 0.73 0.11 <br /> 25 3.73 1.11 0.16 <br /> :C. + - +�_ 30 5.23 1.55 0.23 <br /> (1) (2) (3c) 35 7.90 2.06 0.30 <br /> 40 11.07 2.64 0.39 <br /> _4�.____14.73_ 28_- 0.48 <br /> TOTAL HEAD � �. feet 50 3.99 0.58 <br /> 55 4.76 0.70 <br /> 60 5.60 0.82 <br /> C. Pump selection .�.,,1�X <br /> 1. A pump must be selected to deliver at least 4� gpm (Step A) <br /> with at least � I feet of total head (Step B). <br />