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PRESSURE DISTRII3UTION Sy_ TEM c�1•otextile fabric <br /> T <br /> 1. Select number of perforaCi•d laterals <br /> Quarter inch perforations spaced®3' <br /> 2. Select perforation spacing; _ feet. 9"of rock <br /> 3. Since perforations should not be placed closer than 1 ft. to Perf Sizing 7/32"-1/4" <br /> the edge of the rock layer (see diagram), subtract 2 ft. from Perf Spacing 1.5'-5' <br /> the rock layer length. <br /> so - 2 ft. <br /> Rcxk layer length —--!_I� feet. <br /> a. Determine the number of spaces between perforations. RWplhw 1Plr mnul' n1�. <br /> Divide the length above by perforation spacing and round °H 1. ;...� <br /> down to nearest whole number. <br /> 1.0a 0.56 0.74 <br /> Length erf. spacing = ft. ft. spaces <br /> N8 _ 3 2-Ob 0.80 1.04 <br /> g P _ �� <br /> (3) (2) a.Use for single family homes <br /> 5. Number of perforations is equal to one plus the number of b.Use for all other applications <br /> perforation spaces . <br /> spaces + 1 — perforations lateral Maximum number of quarter inch perforations} <br /> lateral to guarnantee<10%discharge variatioi <br /> Perforation <br /> 6. Multiply perforations per lateral by number of laterals to SfPa jjy 2 <br /> get total number of perforations. 2.5 14 18 28 <br /> lateral s x p /� ,_—L perforations. 3.0 13 17 26 <br /> 3.3 12 16 25 <br /> 7. Determine required flow rate by inultiplying 4.0 11 15 23 <br /> number of perforations by flow per perforation 5.0 10 14 22 <br /> peds x gpm/perf M$pm- MANWOIO LOCATED AT 00 Or PRESPAE OMMOUnck SKTEM <br /> 8. If laterals are connected to header pipe as shown on upper <br /> example, to select minimum required lateral diameter; enter 1 <br /> table with perforation spacing and number of perforations ��� ,,,•"`'°� "---- <br /> per lateral. Select minimum diameter for <br /> perforated lateral inches. <br /> I.A 0 T 01 I(MOMA/c0 MI LA11M11.OM <br /> McssN c wsrawowr M YOYrO <br /> I/.OYl1y I.{lt Ill <br /> 9. If perforated lateral system is attached to manifold pipe near ..E=WMT& <br /> the center, lower diagram, perforated lateral length and <br /> ... <br /> number of perforations per lateral will be approximately one <br /> half of that in step 8. Using these values, select minimum <br /> diameter for perforated lateral = --Ljh-- inches. <br /> 11 <br />