77 Ill. Adm. Code 890.1380
Storm Water Drainage within a Building
Section 890
Section 890.1380Â Storm Water
Drainage within a Building
Any piping installed within a
building for the purpose of carrying storm water from a roof and connected to a
building drain or building sewer shall comply with the requirements of Appendix
A.Table A (Approved Building Drainage/Vent Pipe) and Sections 890.910 through
890.930.