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. _ --..._ ..'. . � . _ _ _. .Y. . <br /> e <br /> � SITE ADDRESS Z � F�7 N 1�"f� INSTALLER �w1�-�-W l�'� <br /> PRESSURE DISTRIBUTION SYSTEM WORRSHEET - RESIDENTIAL <br /> A. Number of laterals � OA (i L►C��Q► <br /> B. Perforation spacing 3� ftOB r--- <br /> r - <br /> C. Rock layer length�� �ft less 2 ft = �t� ft CO <br /> (total length if erid load) <br /> (� total length if ctr load) <br /> D. Number of spaces between perf's = CO/OB = � spaces O <br /> E. Number of perf' s per lateral = DO+ 1 = -1 perf s /lat. O <br /> F Total perforations =�A x E�= �� Perforations OF <br /> G. Flow rate per perf: If 1/4" perfs, us 0.74 G <br /> If 7/32" perfs, use 0.56 gpm � <br /> ***** ******** <br /> H. Required flow rate =O x G�_*__��gpm * � <br /> *** ********** <br /> STANDARD REQUIRED FLOW RATES ( 1/4" perfs, 3' spacing) <br /> Rock Bed Length 37.5' 40.0' 50.0' S5.0' 63.0' 70.0' <br /> Bedrooms 3 3+10$ 4 4+10$ 5 5+10$ <br /> Total # perfs 36 39 51 54 60 72 <br /> REQ'D GPM 26.6 28.8 37.7 40.0 44.4 53.3 <br /> **** **** **** **** **** <br /> TO REDUCE REQ'D FLOW RATE: <br /> 1 . Use 7/32" perfs instead of 1/4" (Reduce GPM by 25�) <br /> OR <br /> 2. Reduce number of perfs by increasing spacing between perfs <br /> (Maximum spacing allowed = 5.0' ) (Re-calculate A thru H) <br /> MAXIMUM ALLOWED PERFS PER LATERAL ; <br /> End load Center load <br /> Perf spacing, ft Lateral diam. : 1 .5" 2.0" * 1 .5" 2.0" <br /> * <br /> * <br /> 2.5 - - - - - - - - - - - - - - 18 28 ,*k 9 14 <br /> * <br /> 3.0 - - - - - - - - - - - - - - 17 26 * 9 13 <br /> * <br /> 3.3 - - - - - - - - - - - - - - 16 25 * 8 13 <br /> * <br /> 4.0 - - - - - - - - - - - - - - 15 23 * 8 12 <br /> * <br /> 5.0 - - - - - - - - - - - - - - 14 22 ,*k 7 11 <br /> * <br /> SIDE 1 OF 2 <br />