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F-17 <br /> � P1TMP SFi FCTi(�1V PROCEDURE <br /> E1�D PERFORATION OF 4 PERFORATED L-TE��L <br /> A. Determine pump capacity: w-�- <br /> Gravity Distribu�on T.,.� <br /> 1. Minimum suggested is 600 gallons per hour(]0 gpm) to stay ahead of _ . - � � <br /> �� lr�r d Geswn=Fm-c(or lei- <br /> �•Lar7 Lo1�r �������o.�l v re.��W <br /> water use nte. <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 ,, . �+�•�a b��M���^�•�h <br /> ��� � � <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. �,,.Rw ,-_., �.a, �:•�e f��. <br /> �.ie .�a s u�.. <br /> _ . . �� P.n«vrw.�otaNa n <br /> Pressure Distibution �w^��- �"""''`"'"' <br /> 3.a. Select number of perforated laterals 3 <br /> b. Select perforation spacing= z feet °"""°'�°" '"°'"��""° <br /> ��.�.��a,.. <br /> c. Subtract 2 ft from the rock layer length. <br /> ��-2 ft.=�feet <br /> d. Det r�in�e the number of spaces bet�veen perforations. <br /> L,ength perf.spacing= � � ft.+ 3 ft.= a� spaces Required PerforadonD�e <br /> e. �� spaces+1 =��perforations/lateral �s���PeT��re�SPmr <br /> f. Multiply perforations per lateral b�number of laterals to 7�3�'' '�ase �2 m��,, i m�� <br /> get totat number of perforations. „��,� x �- ,�Q,,_�_perforations. �f�c> <br /> g• � X-��,,�_�-$Pm. _ <br /> 1.Oa 0.56 0.74 <br /> SELECTED PUMP CAPACIIY��gpm 2.�b �.8� 1.�4 <br /> B.Determine head requirements: a.Use for single family homes <br /> 1. Elevation difference between pump and point of discharge. b.Use for all other applications <br /> _lo feet <br /> � 2. If pumping to a pressure distribution system,five feet for pressure <br /> required at manifold if gravity s tem,zero. <br /> JS feet <br /> 3. Friction loss <br /> a. Enter friction loss table with gpm and pipe diameter. Pipe Lengch <br /> Read friction loss in feet per 100 feet from table. � Point of Discharge <br /> F.L._ �.L ft./100 ft of pipe T�oo�j <br /> b. Determine total pipe length from pump to discharge Ele�acion Differrnce I <br /> point. Add 25 percent to pipe length for fitting p�P _�j� <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 ti 2�1�xel.�=�_feet F-18b <br /> C. CalCulate total friCtion 1055 b multi 1 n 1.5 inch 2.0 inch 3.0 inch <br /> Y P Yl g � �a;�i�.��oo a oc�a� <br /> friction loss in ft/100 ft by equivalent pipe length. <br /> Total friction loss= a, (, x 3 I +100=�feet j2 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 fricdon loss. 16 1.63 0.48 <br /> 18 2.03 0.60 <br /> 20 2.47 0.73 0.11 <br /> �o + S +�_ 25 3.73 1.11 0.16 <br /> (1) (2) (3c) 30 5.23 1.55 0.23 <br /> 35 7.90 �.06�. 0.30 <br /> 40 11.07 .2.64 039 <br /> TOTAL HEAD � � feet 45 1a.73 3.28 0.48 <br /> 50 3.99 0.58 <br /> C. Pump selection 6o s.bo o.sz <br /> � 1. A pump must be selected to deliver at least <br /> 39 gpm (Step A) with at least ��feet of total head (Step B). <br />