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Every vent stack shall connect to the base of the drainage stack. The vent stack shall connect at or below the lowest horizontal branch. Where the vent stack connects to the building drain, the connection shall be located within ten pipe diameters downstream of the drainage stack.
Stack vents and vent stacks connected into a common vent header at the top of the stacks and extending to the open air at one point shall be sized in accordance with the requirements of Section 18-29-916.1. The number of fixture units shall be the sum of all fixture units on all stacks connected thereto, and the developed length shall be the longest vent length from the intersection at the base of the most distant stack to the vent terminal in the open air, as a direct extension of one stack.
(Amend Coun. J. 10-14-21, p. 37722, Art. IX, § 2)
The vent pipe shall terminate by extending to the outdoors through the roof or the side wall in accordance with one of the methods identified in Sections 18-29-904.1.1 through 18-29-904.1.4.
(Amend Coun. J. 11-8-12, p. 38872, § 369; Amend Coun. J. 10-14-21, p. 37722, Art. IX, § 3)
Where the rooftop is to be used as a promenade, restaurant, bar, sunbathing deck, observation deck or for similar purposes (occupiable rooftop), open vent pipes shall terminate not less than 7 feet (2134 mm) above the highest walking surface located within 10 feet (3048 mm) horizontally.
(Added Coun. J. 10-14-21, p. 37722, Art. IX, § 3)
Vent terminals extending through the wall shall terminate not less than 10 feet (3048 mm) from the nearest abutting lot line and 10 feet (3048 mm) above the highest adjacent grade within 10 feet (3048 mm) horizontally of the vent terminal. Vent terminals shall not terminate under the overhang of a structure with soffit vents. Sidewall vent terminals shall be protected to prevent birds and rodents from entering and blocking the vent opening.
(Added Coun. J. 10-14-21, p. 37722, Art. IX, § 3; Amend Coun. J. 12-14-22, p. 58278, Art. VI, § 18)
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