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, � . F-17 <br /> PiTMP SEL,ECTION PROCEDURE <br /> � �. F1dD PERFORATtON OF p PERFORATED LeTEpoL <br /> A. Determine pump capacity: �-� <br /> Gravity Distribution i�� <br /> 1. Minimum suggested is 600 gailons per hour(10 gpm)to stay ahead of _ -:. - ' a�..N�w�,k�,,,,,- <br /> water use rate. �. "'�"�`""� `��°"`°��°'••"�""�" <br /> � .�,��,«�,�..� <br /> 2.. Maximum suggestedfo�de ivery to a drop box of a home system is 2,700 _. . ��•��a"'�'"°��_°^'°'� <br /> Nb C00 fie� Tey <br /> gallons per ho (45 m) prevent build-up of pressure in drop box. ,:.,•�,,„ �-.,�.�.� �:•�e Eaa. <br /> .. o n Nla M! ef Nect LN�r <br /> , . ... PY/pv/1pr LDcatM el <br /> Pressure Distibution �"°"5"'°�°„ �•��""«`.�."� <br /> 3.a. Select number of perforated laterals . ' <br /> b. Select perforation spacing= ,--- fee� ����b'M►�,'�„`„"��"° <br /> c. Subtract 2 h.from the rock layer lengih. <br /> ����-feet <br /> d. Det rnune the number of spaces between perforations. <br /> Length perf.spacing= .ft._+_„�lt�- spaces Requ�d Prrfor�eo�D����� <br /> e. spaces+ 1_= perforations/lateral u+galloro per aunute(gpm <br /> f. Multiply perforations per lateral by number of laterals to �H�e �Zm��,, `ad� <br /> get total number of perforations. �,�,,,, x �;����'�- `-perforations. �f�c> <br /> g �" XT� gP�� 1.Oa 0.56 0.74 <br /> SELEC'TED PUMP CAPACTTY �-1� gpmm�-x • 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 /> �_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. , p'P�L�B� , <br /> Read friction loss in feet per 100 feet from table. � � Po�n�of D�schars� <br /> F.L._, 3.��ft./100 ft of pipe ' ��I <br /> b. Determine total pipe length from pump to discharge Elevation Differcnce� - <br /> point. Add 25 percent to pipe length for fitting pi,n,p 7,2 <br /> loss,or vse a fitting loss chart. Equivalent pipe <br /> length-1.25 times pipe length= F-18b <br /> "� !� x1.25= 39 � feet <br /> 1.5 inch 2.0 inch 3.0 inch <br /> c. Calculate total friction loss by multiplying � Friaim loce pa IOOft of pipe <br /> . friction loss in h/100 h by equivalent ipe length. 10 0.69 0.20 <br /> Total friction loss= "�`1� x 3.� � +100= /J feet 12 0.96 0.28 <br /> 4. Total head required is the sum of elevation difference, t4 1.28 0.38 <br /> special head requirements,and total friction loss. 16 1.63 0.48 <br /> 18 2.03 0.60 <br /> 20 2.47 0.73 0.11 <br /> �a _+ - +� 25 3.73 l.il 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 2.64 039 <br /> TOTAL HEAD �feet 45 1a.73 3.28 0.48 <br /> 50 3.99 0.58 <br /> 55 4.76 0.70 <br /> C. PumP Selection 60 5.60 0.82 <br /> 1. A pump must be selected to deliver at least <br /> y� gpm (Step A) with at least �feet of total head (Step B). <br /> m r.�,�C.• <br />