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` ' r F-17 <br /> P[JMP SELECTTON PROCEDURE <br /> El� PERFORATION OF A PEtiFORATED IATERAI <br /> A. Determiae pump capadty: d-�•••• <br /> Gravity Disiribution T....w � <br /> 1. Minimum sugg+ested is 600 gallons per hour(10 gpm)to stay ahead of ..�:;,,:...... . . «�..,„,w,�,,,k,.,,,,,- <br /> waber use rate. . w....�.�.r..� :r�'N..�..:.;,......... <br /> 2. Maximum suggesbed for delivery to a drop box of a home system is 2,700 �W�����N�ti <br /> wa w wn.n. <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. .� , a��.�... <br /> Pressure Distibntion ��:`�. :�::.. . . ••w�i.�.ue.�...� <br /> . CNw!rM 1�r Mnw N 4�w4 <br /> 3.a. Select number of petforated laterals 3 . . . . . <br /> b. Select perforation spadng=�_feeti :«".,�,.,'':�",;�""' <br /> c. Subtract 2 it from the rock layer length. <br /> �-2 f�_�feet <br /> d. Deternune the number of spaces between perforations. <br /> I,ength pesf.sp3�ing s,��ft.+�ft.=1,�spaces R�quired Per(oration Di��e <br /> e. I 3 spaces+1=_L`�Perfontions/lateral �+&�u«►+per a+�,�ce <br /> f. Muldply perforations per lateral by number of laterals to i�y'R � '��� �2„a*,,,, y�,d,.� <br /> get total number of perforations.� x-�_ � perforahons. �f.�y <br /> g� � "�'''a��� 1.Oa 0.56 0.74 <br /> s�c-r�n�c�Acmr�L gp� 2.Ob 0.80 1.04 <br /> B.Determiae head requiremmts: a.Use for single family homes <br /> 1. Elevation difference�between Qump 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 /> requir+ed at manifold if gravity system,zero. <br /> �feet <br /> 3. Friction loss <br /> a. Enter friction loss table with gpm and pipe diameter. RP��8� <br /> Read friction loss in feet per 100 feet from table: Poinc of Discharge <br /> F.L= /• �. ft/100 ft oE pipe /oa, <br /> b, Determine to�l pipe length from pump to discharge p��,o�p;g�,� <br /> poinG Add 25 percent to pipe length for fitting p `;�'�� <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-i.?5 times p�length s F-isb <br /> �J x 1.25= /0 y- feet <br /> c, Calculate total fricfion loss by muldplying 1S inch 20 inch 3.0 inch <br /> � r�a��o.p.�oo a�r�� <br /> friction loss in h/]00 h by equivalent pipe length. 10 0.69 0.20 <br /> Total friction loss= __,(_�__r x D L +100=�_feet 12 0.96 0.28 <br /> 4. Total h�d required is the sum of elevation difference, l4 1.28 0.38 <br /> special head requiresnents,and total fricdon loss. 16 1.63 0.48 <br /> 18 203 0.60 <br /> 20 247 0.73 0.11 <br /> _�_+�_+_3_ 2S 3.73 1.11 0.16 <br /> (1) (2) (3c) 30 5.23 135 0.23 <br /> 33 7.90 2.06 0.30 <br /> 40 11.07 2.64 0.39 <br /> TOTAL HEAD ��feet � 4S I4.73 3.28 0.48 <br /> SO 3.99 0.58 <br /> SS 4.�6 0.70 <br /> C. Pump selection 6o s.6o o.s2 <br /> 1. A pump must be selected to deliver at least <br /> 3 J gpm (Step A)with at least 1�_feet of total head(Step B). <br />