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SITE ADDRESS —7 �/ S PJ r`. �'.N 1aA L INSTALLER �� T"►'� <br />PRESSURE DISTRIBUTION SYSTEM WORRSHEET - RESIDENTIAL , <br />A. Number of laterals 6 ® C ( <br />B. Perforation spacing 3 ftOB <br />C. Rock layer length ft less 2 ft = ft <br />(total length if end load) <br />( is total length if ctr load) <br />D. Number of spaces between perf's = ©/OB = / spaces@D <br />E. Number of perf's per lateral =OD + 1 = AV perfs /lat. <br />F Total perforations =OA x ®_ imperforations OF <br />G. Flow rate per perf: If 1/4' perfs, use <br />If 7/32' perfs, use 0.56 gpm <br />H. Required flow rate = FO x Q =* 7 qpm <br />STANDARD REQUIRED FLOW RATES (1/4" perfs, 3' spacing) <br />Rock Bed Length <br />37.5' <br />40.0' <br />50.0' 55.0' 63.0' <br />70.0' <br />Bedrooms <br />3 <br />3+10% <br />4 4+10% 5 <br />5+10• <br />Total # perfs <br />36 <br />39 <br />51 54 <br />72 <br />REQ'D GPM <br />26.6 <br />28.8 <br />37.7 40.0 L14.4 <br />53.3 <br />TO REDUCE RFc'D FLOW RATE: <br />1. Use 7; 12' perfs <br />instead <br />of 1/4" <br />(Reduce GPM by 25%) <br />OR <br />2. Reduce number of <br />perfs <br />by <br />lasing spacing between <br />perfs <br />(Ma::mum spacing <br />allowed = <br />_-.01) (Re -calculate A <br />thru H) <br />MAXIMUM ALLOWED PERFS PER LATERAL: <br />End <br />load <br />Center <br />load <br />Perf spacing, ft <br />Lateral diam.: 1.5" <br />2.0" <br /># <br />1.5" <br />2.00 <br />2.5 - - - - - <br />- - - - - - - - - 18 <br />28 <br />* <br />9 <br />14 <br />3.0 - - - - - <br />- - - - - - - - - 17 <br />26 <br />; <br />9 <br />13 <br />3.3 - - - - - <br />- - - - - - - - - 16 <br />25 <br />* <br />8 <br />13 <br />4.0 - - - - - <br />- - - - - - - - - 15 <br />23 <br />,*t <br />8 <br />12 <br />5.0 - - - - - <br />- - - - - - - - - 14 <br />22 <br />7 <br />11 <br />SIDE 1 OF 2 <br />