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PRESSURE DISTRIBUTION SYSTEM Geotextile fabric <br /> 1. Select number of perforated lateraLs � � ,;��, `�'om��'S a�a�3 1�;� <br /> J <br /> 2. Select perforation spacing=_�fee� . s"�E iac�c <br /> ;., , :. , , <br /> , , _ <br /> 3. Since perforations should not be placed closer than 1 ft. to P�Sizing 7/32�-i/4" <br /> Perf Spacing 1.5'-5' <br /> the edge of the rock layer (see diagram),subtract 2 ft. from <br /> the rock layer length. <br /> �?� <br /> ����� - 2 ft. _�feet <br /> 4. Determine the number of spaces between perforations. �����°i�'�` <br /> Divide the length above by perforation spacing and round °� :��� ;�.� <br /> down to nearest whole number. "�" <br /> 1.Oa 0.56 0.74 <br /> Length perf. spacing= 6( ft. +�ft. _ �c> p 2.Ob 0.80 1.04 <br /> s aces <br /> �3� �2� , a.Use for single family homes <br /> b.Use for all other applications <br /> 5. Number of perforations is equal to one plus the number of <br /> perforation spaces . <br /> Maximum number of quarter inch perforations p <br /> �� spaces + 1 = a � perforations/lateral �t�co��,c�<io�io discharge variaaon <br /> Perforation <br /> -- . 6. Multiply perforations per lateral by number of laterals to Sgf�jg 1; 1� 2 <br /> get total number of perforations. 2,5 14 1$ 28 <br /> � x ��L�_�perforations. 3.0 13 17 26 <br /> 3.3 12 16 25 <br /> 7. Determine required flow rate by multiplying 4.0 11 15 23 <br /> number of perforations by flow per perforation 5.Q 1� 14 22 <br /> �� .S��o <br /> � wuaro�o �outID �T wo a v�sa�c as�rraH srsh� <br /> � x ���= 3(o m. <br /> �/3� <br /> � <br /> ....,.,. <br /> 8. If laterals are connected to header pipe as shown on upper <br /> e�nple, to select minimum required lateral diameter;enter ���" <br /> table witli perforation spacing and number of perforations ,,�'°"� '�'"` <br /> per lateral. Select minimum diameter for ��`°"� <br /> perforated lateral= � inches. <br /> u+wr w rarw►r[o r+[urc�u.s ra <br /> . r�ctwwt a:nrmo.w uawo <br /> �OYO�WIK/R <br /> 9. If erforated lateral s stem is attached to manifold i e near ���`�'p`�� -�"'°"��� <br /> - _ P Y P P r�..,,,� <br /> the center, lower diagram,perforated lateral length and .�,,.��»��.. <br /> number of perforations per lateral will be approximately one ' '` - -- ..,�,,��.� <br /> half of that in step 8. Using these values,select minunum �.�, �. <br /> diameter for perforated lateral= I ,/y inches. ,,,.�°`"`� �,,.�.�, <br /> �� <br />