LAC 51:XIV.933. Main Vents to Connect at Base

A. All main vents or vent stacks shall connect full size at their base to the building drain within 10 pipe diameters of the main soil or waste pipe or to the main soil or waste pipe, at or below the lowest fixture branch. All vent pipes shall extend undiminished in size to the vent terminal, or shall be reconnected with the main soil or waste vent.