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, � <br /> EjIMP SEL.ECTIQN PR CEDLTt_tE <br /> A. Det�rmine�pump cap�diy: ' � <br /> Gravily Distribution trro a�ow►TwH GF A �ERFORATEO LATERAL <br /> 1. Minimum sugge$ted is 6�0 gall�ns per hour(1D gpm)io siay ahe�of w«�z«,« <br /> water use rate. � <br /> 2. Maximum sugg�t�d f�r detiv�ry to a drop box of a home system is 2,700 �,,,: ., . . . .�,��;: <br /> gallons per hour(45 gpm)to prevent build-up of prc�ssure in drop box. ;: �r a�e�, �k�'�.,"�.���.�.�' <br /> Pressure DistribuHon " �"`°�NOf�TM"ah <br /> 3. a. Select number af p�rfo�°ated t�ter�ls -3 ti' � ;;�'��' <br /> b. Select perforation spacing� 3 ft. > F..::•.::.��' :..: . .. ' <br /> r... P�rtaoibnt locarN o� <br /> c. Sub��ct 2 ft.from tbQ rock layer length. �E.;: s��� �"'°"'°'`°"�' <br /> �•2ft.. //v ft. ,.:::~...::. : . :. - ., .� <br /> T� ' 9r1�Iro1 a011 i►ep�rl�r ScarlflN <br /> a,ron v1a�p seea Loy« <br /> d. Determine the nnmber of spaces between perforations. <br /> Length perf.SpSCIn$s ��D ft.+ 3 ft.; 3Co S�CQS TAEl.B OF PHRAORATION DISCtlARGES M GPM <br /> e. �spac�s+ 1•�p�rforations/l�teral " <br /> '� f. Mulaply perforadons per lateral by number of laterals to HQaa Pcrtoranon a�,t,�ca d�t,�s) <br /> get total number of perforations. ,�n ,�� <br /> y�� x �• /// perforations. <br /> ].� 0.56 0.94 <br /> g• � X�_�8Pm• �.s o.w <br /> z.ob o.so �.a <br /> 2.S 0.89 1.17 <br /> SELECTED PUMP CAPACITY� m 3A o.98 t.2s <br /> gP 4A ].13 1.47 <br /> SA ].?b 1.65 <br /> B.Determine head:equir�ments: AU6i�•O EOM OE hl11d f0[ltlldltlHBl 6)r6fCQ1R <br /> 1. Elevaeon differen�between pump and point of discharge. bU�e 3.D feet of head!or other eambl(aha4aits <br /> �feet <br /> 2. If pumping to a pressure distribuHon system,add five feet for pressure <br /> required at manifold � .. <br /> , -� feet <br /> 3. Fricdon loss �'��"g�' • <br /> a. Enter fricdon loss table with gpm and pipe diameter. Aoint of Discharge <br /> Read hiction los�in feet per 100 feet from table. <br /> F.L.= S.lo ft./100 ft of pipe Elsvadon Diffennce <br /> b. Determine total pipe length from pump to discharge p <br /> .point. Add 25 percent ta pipe length for fitting . <br /> loss,or use a fitting loss chart. Equivalent pipe F-18b <br /> length-1.25 dmes pipe length= <br /> 1.5 inch 2.0 inch 3.0 inch <br /> Zy5 x 1.25 s�feet 8P�„ t�n��w�.�ioo n�qw <br /> c. Calculate to�l Erlction loss by multiptying 10 0.69 0.20 <br /> friction loss in ft/100 ft by equivalent plpe length. 12 0.96 0.28 <br /> Total friction loss; �_x 5,�_ +100•�fett 14 1.28 0.38 <br /> 4. Total head required is the sum of elevation difference, ig 2A3 0.60 <br /> special head requirements,and total fricdon loss. 20 2.47 0.73 O.l l <br /> . 25 3.73 1.11 0.16 <br /> �_+ J'! + �7, 30 3.23 1.55 0.23 <br /> (1) (2) (3c) 3S ?.90 2.06 0.30 <br /> 40 11.07 2.64 0.39 <br /> 45 14.73 3.28 0.48 <br /> TOTAL HEAD �� feet SO � 3.99 O.S8 <br /> SS � 0.70 <br /> � 60 0.82 <br /> C. Pump selection <br /> 1. A pump must be selected to deliver at least . gpm (Step A) SL 3 � /�/5 <br /> with at least�0.. feet of total head (Step B). <br />