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� F-17 <br /> � PLT_'�iP SELECfTON PROCEDURE �� <br /> E1D PERfORAT10N OF A PERFORATFJ L�TE�lL <br /> �►. Determine pump capadty: �,..�.., <br /> Gravity Distribution ,�„ <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of : ,. . . <br /> •�t++q SN lN+r' •y�N Gwan�.fe.e Ir iv <br /> Water u���. M1�N��rr�u.rM <br /> ��M��w r�w A�! <br /> 2 Maximum sugges delivery to a drop box of a home system is 2,700 � ►••+:••�a btl�.•���,•R <br /> .,»�..,... �.. <br /> gallons per ho 45 o prevent build-up of pressure in drop box. ��ti.,,� � ,::_�w �r�.:.,, <br /> t.r- <br /> Pressure Distibution - ��c�s«u,. `��"�``p��„ <br /> ..n.,M w.ti <br /> 3.a. Select number of perforated laterals <br /> b. Select rforation s dn - feet °"�'��^�-+���� <br /> Pe Pa S- �...»e..�,.�,,,. <br /> c. Subtract 2 ft.from the rock layer length. <br /> ���-2ft.=' feet <br /> d. Determine the number of spaces between perforations. <br /> Length perf.spacing=_f�+ ft.= spaces g�,,;�p���np�t,,�� <br /> e. spaces+1= perforations/lateral m sauo�per�n,�e(gp�f <br /> f. Multiply perforations per lateral by number of laterals to �Be , <br /> get total number of perforations. �,�„�� x �3 ��- perEorations. ��j �z�� +''P°' <br /> g' � X a��' $P� . <br /> 1.Oa 0.56 0.74 <br /> SELECT'ED PUMP CA.PACITY�' �gpm)'►'1�-X 2.Ob 0.80 1.04 <br /> B.Determine head requirements: a.Use for single family homes <br /> l. Elevation difference between pump and point of discharge. b.Use for all other applications <br /> �,feet <br /> � 2 If pumping to a pressure distribudon system,five feet for pressure <br /> required at manifold if gravity system,zero. <br /> - feet <br /> 3. Friction loss <br /> a. Enter fi-iction loss table with gpm and pipe diameter. Pipe Lengch <br /> Read friction loss in feet per 100 feet from table. � ' <br /> RL= �.:.t(h./100 ft of pipe Poinc of Dq harg <br /> b. Determine total pipe length from pump to discharge F1e�arian Difference I <br /> point Add 25 percent to pipe length for fitting p�,p -�rq z t <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 times pipe length= F-18b <br /> �_x 1.25= l o c� feet <br /> 1 S iach 2.0 inch 3.0 inch <br /> c. Calculate total friction loss by multiplying � �;�;a„��,����� <br /> friction loss in h/100 h by equivalent pipe length. 10 0.69 0.20 <br /> Total friction loss= 3-��s x l o J +100=�_feet 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 0.48 <br /> 18 203 0.60 <br /> 20 Z47 0.73 0.11 <br /> ��7 + --- + 3 ZS 3.73 1.11 0.16 <br /> (1) (2) (3c) 30 5.23 1S5 0.23 <br /> � 35 7.90 2.06 0.30 <br /> TOTAL HFAD a�feet • 40 11.07 2.64 039 <br /> 45 14.73 3.28 0.48 <br /> 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 �a feet of total head(Step B). <br />