LAC 51:XIV.929. Yoke Vents—Stacks of More Than 10 Branch Intervals

A. Soil and waste stacks in buildings having more than 10 branch intervals shall be provided with a yoke vent at each tenth interval installed, beginning with the top floor. The size of the yoke vent shall be equal to the size of the vent stack to which it connects. The lower end of each yoke vent shall connect to the soil or waste stack through a wye below the horizontal branch serving the floor, and the upper end shall connect to the vent stack through a wye not less than 3 feet (914 mm) above the floor and not less than 6 inches above the flood-level rim of the highest fixture served on the floor.