Laserfiche WebLink
. PRESSURE DISTRIBUTION SYSTEM <br /> 1. Select number of perforated laterals 3 <br /> 2. Select perforation spacing = cg ft. <br /> 3. Since perforations should not be placed closer than 1 ft. to <br /> the edge of the rock layer (see p. E-14), subtract 2 ft. from the <br /> rock layer length. c- <br /> Roc layer length - 2 ft. = 23 ft. <br /> 4. Determine the number of spaces between perforations. <br /> Divide the length above by perforation spacing and round E-17a <br /> down to nearest whole number. TABLE OF PERFORATION DISCHARGES IN G1'N' <br /> Head Perforation diameter(inches) <br /> Length perf. spacing -=Z.3 ft. 3 ft. = 7 spaces 7/32 114 <br /> (3) (2) 1.0a 0.56 0.74 <br /> 1.5 0.69 0.90 <br /> 5. Number of perforations is equal to one plus the number of 2.Ob 0.80 1.04 <br /> 2.5 0.89 1.17 <br /> perforation spaces . 3.0 0.98 1.28 <br /> 4.0 1.13 1.47 <br /> 7 spaces + 1 = 5.0 1.26f 1.65 <br /> p perforations/lateral aUse 1.0 foot of head for residential systems. <br /> bUse 2.0 feet of head for other establishments <br /> 6. Multiply perforations per lateral by number of laterals to <br /> get total number of perforations. E-17b <br /> SMasao=alkmale opo b of mc8 pn, oa pa luail to <br /> x _Q._ = /perforations. `I°` ""` m <br /> laterals pads/lateral °1"�rm? <br />