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1 � } t . <br /> F-17 <br /> Sn_�SEL-ECTION PROCEDLmE <br /> [ln ►ERFORATION OF A PERFORATED �ATERAL <br /> A. Detera�ine.puatp capuity: �� . <br /> Gravity Diatribution T....w � <br /> 1. Minimum sugge.sted is 600 gallons per hour(]0 gpm)to stay ahead of .y:,,::.... . .. .; N p«wnw IWrk(r iwr- <br /> water use rate. �..N �..,..�.�.r. ��:P'�.�.��,w....Y...� <br /> 2. Ma�dmua►suggested for delivery to a drop box of a home sysMm is 2,700 w���°�^µ� <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. ,�• , N��.�..• <br /> Pressure Distibution `';�,., .:.. - . '"��"�•••� <br /> o��.w ur. <br /> 3.a. Select aumber of perforated laterals � . • • . <br /> b. Select perforatlon spacing=.�_fee�. �.�w�.,':"'" <br /> c. Subtract 2 ft from the rock layer length. <br /> ��-2 ft=��feet <br /> d. Detenaiae the number of spaces between perforations. <br /> �� �,��g:,}�,fG+ 3 ft._�_spaces Requtrtd Pesforation�aege <br /> e. „�f�,SPBCCS+1=�Y�"Ol3130l1S/litltdl �6��PQ a+inute f <br /> f. Multlply perforadons per lateral�Y, number of laterals to �J y`'�,,,� �• �2„a� y�A� <br /> totalnua�b��f perforations..� x-�-�,= S� perforations. � <br /> g. � x���..�_�.8P� � • <br /> 1.Oa 0.56 0.74 <br /> SELEC'TED PLJIV�CAPACZTY�gpm 2.�b �.8� 1.�4 <br /> B.Detera�e head requirea�mL� a.Use for single family homes <br /> 1. Elevation difference�betweea pump at�d point of discharge. b.Use for all other applications <br /> �_feet <br /> 2. If pumping to a pressure distributioa system,five feet for pressure <br /> requir+ed at manifold if gravity system,zero. <br /> �_feet <br /> 3. Fr�ction loss . <br /> a. Enter Eriction loss table with gpm and pipe diameter. R��8� <br /> Read friction loss in feet per 100 feet from table: Poinc of Discharge <br /> F.L= a•S ft/100 ft oE pipe T�ny <br /> b, Determire total pipe length from pump to discharge nc.,,no„D,fiEere„u I <br /> point Add 25 peraent to pipe length for fitting p 1�ss <br /> loss,or use a flttirig loss chart. Equivalent pipe <br /> len 1.?S dmes i len = <br /> �. a)0 P�X1.?5= a�3 feet F-18b <br /> 1.5 inch 20 inch 3.0 inch <br /> c. Calculate total friction loss by mulHplying g�„ r��.�,00n�c�r <br /> friction loss in h/100 h by equivalent pipe length. l0 0.69 0.20 <br /> Total f:iction loss= a•S ,x a V 3 +100= 7 feet �2 0.96 0.28 <br /> 4. Total head required is the sum of elevation difference, la 1.28 0.38 <br /> special head requiresnents,and total friction loss. 16 1.63 0.48 <br /> 18 203 0.60 <br /> 20 247 0.73 0.11 <br /> � �_+ .S + '� 2S 3.73 1.11 0.16 <br /> (1) (1J (3� 30 5.23 1S5 0.23 <br /> � 3S 7.90 2.06 0.30 <br /> �- -1I:07 _ ?Z.64 U.39 <br /> TO?AL HEAD � I feet � 45 14.73 3.28 0.48 <br /> SO 3.99 0.58 <br /> SS 4.76 0.70 <br /> G Pump selection 6o s.6o o.sz <br /> 1. A pump must be selected to deliver at least <br /> �� gpm (Step A)with at least �� feet of total head(Step B). <br />