AUTHORITY: Implementing and authorized by Section 35 of the Illinois Plumbing License Law [225 ILCS 320].DEPARTMENT OF PUBLIC HEALTH
a) All piping and fittings used in the vent system shall conform to requirements of Appendix A, Table A, "Approved Building Drainage/Vent Pipe" and "Approved Standards for Fittings".
b) A system carrying corrosive waste shall be of approved materials as in Appendix A, Table A, "Approved Building Drainage/Vent Pipe". Vent piping shall be of the same material as the waste piping. (See Section 890.1310(b).)