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+ � <br /> F-17 <br /> Pi]MP SEL.ECI'IO'`T PROCEDURE <br /> E/�p PERFORATION OF o PERFORGT� L�TE�tL <br /> A. Determine pump capacity: w-�� <br /> Gravity Distribution �` T�_ • <br /> 1. Minimum sugg�sted is 600 gallons per hour(70 gpm)to stay ahead of - �� :,;,,,«�..N�w�„K�„,,,- <br /> water use rate. � "...'S"'°""` ""�b".�"°'.W""`"...a <br /> � ����....�.m.,, <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 ,, , ��•��a��».�._^^.��h <br /> N»� ,..e, � <br /> gallons per how(45 gpm?to pre�ent build-up of pressure in drop box. �,,•,N„�a :' -o�� ��,<<,. <br /> � o.,.«a�.�.�..«a� <br /> Pressnre Distibution �'�^�^�^*- �"""«`°"'°' <br /> 3.a. Select number of perforated laterals�_ <br /> b. Select perforation spacing=�_feet �:�,;';��t,„"'"° <br /> c. Subtra 2 ft from the rock layer length. <br /> ��-2 ft.= S� feet <br /> d. Deternune the number of spaces between perforations. <br /> Length perf.spacing= S3 ft.+�ft._�spaces Required Perforation�e <br /> e. ,�spaces+ 1 =��perforations/lateral �+�1t°�s P�II'i""ce�gp°' <br /> f. Multiply perforations per lateral by numbe�of laterals to �`d8e ''��Zm�p,, �ad��" <br /> get total number of perforations. ,��,� x �,,, ,Q,;=�_perforations. �f�c� <br /> g� �` X�Pd_�gP�� 1.Oa 0.56 0.74 <br /> SELECTED PUMP CAPACITY_y�gpm 2.�b �.g0 1.�4 <br /> B.Detezmine head requirements: a.Use for single family homes <br /> i. 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 gravity system,zero. <br /> �feet <br /> 3. Friction loss <br /> a. Enter friction loss table with gpm and pipe diameter. Pipe La�gth <br /> Read friction loss in feet per 100 feet from table. � ' Potnc of D'achargc <br /> F.L._ �•ey ft./100 ft of pipe Tlo�! <br /> b. Determine total pipe length from pump to discharge �evation Differtncc I <br /> point. Add 25 percent to pipe length for fitting p�,�„p _9z <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 times pipe length= F-18b <br /> I �S x 1.25= 1S�. feet <br /> c. Calcuiate total friction loss b multi 1 n 1.5 inch 2.0 inch 3.0 inch <br /> Y P Yi 8 �� friaim locs pv 100 ft of pipe <br /> friction loss in ft/100 ft b uivalent � e len th. <br /> y`'� P p g io o.s9 0.?o I <br /> Total friction loss= �,1�u x t Sfe +100=�_feet 12 0.96 0.28 <br /> 4. Total head required is the sum of elevation difference, 14 1.28 038 <br /> special head requirements,and total friction loss. 16 1.63 O.a8 ; <br /> 18 2.03 0.60 I <br /> 20 2.47 0.73 O.11 <br /> �+ � +�_ ?S 3.73 1.11 O.16 <br /> (1) (2) (3c) 30 5.23 1.55 0.23 i <br /> 35 7.90 ?06 ; 0.30 i <br /> 40 11.07 2.64 I 0.39 I <br /> TOTAL HEAD �.S feet 50 �4 73 z 99 I 0.58 <br /> 55 4.76 I U.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 aS feet of fotal head (Step B). <br />