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<br /> F-17
<br /> �'1
<br /> F Fi7MP SELF�(�N PROCEDURE
<br /> EI�D PERFOfL1T10N OF A P£RFOHATE� L,TER4�
<br /> !�. Determine pump capacity: �-G»,
<br /> Gravity Distribution r....�, �
<br /> 1. Minimum suggested 'u 600 gallons per hour(10 gpm) ro stay ahead of - . . M�„»„w F,,,K,,,,�..
<br /> water use rate. � �-..�+s.�.�,.� ��"b,..�,,,,.w�.�....d
<br /> .m,...,,�.�"
<br /> 2. Maximum suggesced for delivery to a drop box of a home system is 2,700 „ , ~^��•��a����^ ���°^�."
<br /> titi WO har Te0
<br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. , ,,;�,,„ -., ,.�.� �:•�a �a,.
<br /> I� ol Rx� lP�.�
<br /> . . ArMe�lw Leu�W oi
<br /> Pressure D�stibution ��^��*- �"""" """'
<br /> 3.a. Select number of perforated laterals 3
<br /> b. Select perforation spadng= 3 feet ;:"'.�';,.'�„�""°
<br /> c. Su��t 2 h. from the rock layer length.
<br /> 4S -2 ft._�_feet,
<br /> a��ro�
<br /> d. Deterrrune the number of spaces between perforarions.
<br /> L.ength perf.spacing=�ft. +�ft. _� spaces Requued Perfonbon Dluh e
<br /> e. �spaces+ 1 = �� perforadons/lateral �g�o�p�a,;:,�ce�p�
<br /> f. Mulbply perforabons per lateral by number of laterals to D H�d e �2.a�, � �Q�
<br /> get tocal number of perforabons.�; x �,,, ,Q,,_�perforations. �f�q
<br /> $• � X '��.,r=�BPm.
<br /> 1.Oa 0.56 0.74
<br /> SELECTED PUMP CA.PACITY��gpm 2,Ob Q.8Q 1.04
<br /> B. Determine head requiremmts: a. Use for single family homes
<br /> 1. E]evaHon 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. Fricdon loss
<br /> a. Enter Ericdon loss table with gpm and pipe diameter. Pipe Lrng�h
<br /> Read friction loss in feet per 100 feet from cable. � point o(Dischargc
<br /> F.L = �• l, ft./100 ft of pipe ���s
<br /> b. Deternune total pipe length from pump to discharge E]cva�on Dift�rencc
<br /> pointi Add 25 percent to pipe length for fitting p�p ��J y
<br /> loss,or use a fitting loss chart. Equivalent pipe
<br /> length- 1.25 dmes pipe length= F-�8b
<br /> 41 c� x 1.25 = S1� feet 1.5 inch 2.0 inch 3.0 inch
<br /> c. Calculate total fricbon loss by multiplying � k;�;a„���ioo n�r p,�
<br /> friction loss in ft/100 h by equivalent pipe length.
<br /> Total fricbon loss= S� � x ��lo +100=�_feet 10 0.69 0.20
<br /> 12 0.96 0.28
<br /> 4. Total head required is the sum of elevation difference, 14 1.28 0.38 j
<br /> special head requirements,and total fricdon loss. 16 1.63 O.a8
<br /> l8 2.03 0.60
<br /> 20 2.47 0.73 0.11
<br /> �� I + .� + I 3 25 3.73 1.11 0.16
<br /> (1) (2) (3c) 30 5.23 1.55 0.23
<br /> 35 7.90 2.06 0.30 �
<br /> 40 11.07 2.64 0.39
<br /> TOTAL HEAD �_feet 45 14.73 3.28 O.a8
<br /> 50 3.99 0.58
<br /> 55 4.76 0.70
<br /> C. Pump selection bo s.bo o.s2
<br /> + 1. A pump must be selected to deliver at least
<br /> ._:� �,�gpm (Step A) with at least �_ feet of total head (Step B).
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