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� , �., .. ' a . <br /> SITE ADDRESS ` <br /> ��`��- � 'L� F`` INSTALLER �':`"�� ,� �,�'1��' <br /> . , <br /> PRESSURE DISTRIBUTION SYSTEM WORRSHEET - RESIDENTIAL <br /> A. Number of laterals ��' �A C��1 f��� r :� �����--- <br /> B. Perforation spacing - ft�B <br /> C. Rock layer length ft less 2 ft = ft CO <br /> (total length if end load) <br /> (� total length if ctr load) <br /> D. Number of spaces between perf's = CO/OB = sp�ces OD <br /> E. Number of perf' s per lateral = DO+ 1 = perfs /lat. EO <br /> F Total perforations =�A x E�= perforations OF <br /> G. Flow rate per perf: � 1 4"_,��e_��s, use 0.74 gpm � <br /> If 7/32" perfs, use 0.56 gpm <br /> ************** �� <br /> * * <br /> H. Required f low rate = F�x LG =* gpm * <br /> ************** <br /> STANDARD REQUIRED FLOW RATES ( 1/4" perfs, 3 ' spacing) <br /> Rock Bed Length 37.5 ' 40.0 ' 50_0' 55.0` 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 * 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 * 7 11 <br /> * <br /> SIDE 1 OF 2 <br />