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 J
Size
of Vent Stacks
Number
of Bathroom Groups
Diameter
of Vent Stacks (Inches)
1
or 2
2
3
to 9
3
10
to 16
4