Section 675IAC16-1.4-10. Chapter 9; vents

   Chapter 9 is amended as follows:

(a) Amend Section 901.2.1 by adding an exception to read as follows:

Exception: Floor drains.

(b) Amend Section 904.1, in the first sentence, to delete "[number] inches (mm)" and insert "six (6) inches (152.4 mm)".

(c) Amend Section 917.1 by deleting: "Stack type air admittance valves shall conform to ASSE 1050" without substitution.

(d) Delete the text of Section 917.3 and insert as follows: Where permitted. Individual branch and circuit vents shall be permitted to terminate with a connection to an individual or branch-type air admittance valve. Individual and branch-type air admittance valves shall vent only fixtures that are on the same floor level and connect to a horizontal branch drain. The horizontal branch drain having individual and branch–type air admittance valves shall conform to Section 917.3 or Section 917.3.2.

(e) Delete the text of Section 917.3.3 and insert as follows: Stack. Air admittance valves shall not serve as the vent terminal for vent stacks or stack vents.

(f) Amend Section 917.4 by deleting: "Stack type air admittance valves shall be located not less than six (6) inches (152 mm) above the flood level rim of the highest fixture being vented.".

(g) Amend Section 917.8 by adding a second sentence to read as follows: Air admittance valves shall not be used to vent sump pits.

(h) Amend Section 918.2 (Equation 9-1) as follows: delete "Q_v (gpm) = 27.8 r_s2/3 (1-r_s) D8/3" and insert "Q_v (gpm) = 27.8 r_s^2/3 (1-r_s) D^8/3".

(Fire Prevention and Building Safety Commission; 675 IAC 16-1.4-10; filed Sep 25, 2012, 2:42 p.m.: 20121024-IR-675110448FRA, eff 90 days after filing with the Publisher)