77 Ill. Adm. Code 890.APPENDIX A
A Plumbing Materials, Equipment, Use Restrictions and Applicable Standards
Section 885
Section 890.APPENDIX A
Plumbing
Materials, Equipment, Use Restrictions and Applicable Standards
Section 890.TABLE L
Horizontal
Circuit and Loop Vent Sizing Table
Line
Soil
or waste pipe diam. (in.)
Fixture Units (max. number
Diameter
of circuit or loop vent (in.)
1½
2
2½
3
4
5
Maximum
Horizontal Length (ft.)
1
1½
10
20
2
2
12
15
40
3
2
20
10
30
4
3
10
20
40
100
5
3
30
40
100
6
3
60
16
80
7
4
100
7
20
52
200
8
4
200
6
18
50
180
9
4
500
14
36
140
10
5
200
16
70
200
11
5
1,100
10
40
140