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SITE ADDRESS 7o / <br />j' i c K S +t ` <br />_ INSTALLER <br />PRESSURE <br />DISTRIBUTION SYSTEM <br />WOFRSHEET - RESIDENTIAL <br />A. Number of laterals O <br />B. Perforation spacing ft O <br />C. Rock layer length f' ss 2 ft = ft O <br />(total length i.f end load) <br />(h total length if ctr load) <br />D. Number of spaces between perf's = C@ / OB = spaces O <br />E. Number of perf's per lateral = OD + 1 = perfs /lat. SO <br />F Total perforations = OA x V, _ _perforations <br />G. Flow rate per perf: If 1/4" perfs, use 0.74 gpm �^ <br />If 7/32" perfs, use 0.56 gpm <br />* <br />H. Required flow rate = D x Go <br />STANDARD REQUIRED FLAW RATES (1/4" perfs, 3' spacing) <br />Rock Bed Length <br />37.5' <br />40.0' 1 50.0' <br />55.0' <br />163.0' <br />70.0' <br />Bedrooms <br />3 <br />3+10t <br />4+10$ <br />5 <br />5+10$ <br />Total # perfs <br />36 <br />39 51 <br />60 <br />72 <br />REQ'D GPM <br />26.6 <br />28.R <br />37.7 <br />40.0 <br />)44.4 <br />53.3 <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.n') (Re -calculate A thru H) <br />MAXIMUM ALLOWED PERFS PER LATERAL. <br />End load Center load <br />Perf spacing, ft <br />Lateral diam.: 1.5" <br />2.0" <br />* <br />1.5" <br />2.0" <br />2.5 - - - - - <br />- - - - - - - - - 18 <br />28 <br />* <br />9 <br />14 <br />3.0 - - - - - <br />- - - - - - - - - 17 <br />26 <br />* <br />,*� <br />9 <br />13 <br />3.3 - - - - - <br />- - - - - - - - 16 <br />25 <br />* <br />* <br />8 <br />13 <br />4.0 - - - - - <br />- - - - - - - - - 15 <br />23 <br />* <br />8 <br />12 <br />5.0 - - - - - <br />- - - - - - - - - 14 <br />22 <br />* <br />; <br />7 <br />11 <br />SIDE 1 OF 2 <br />