Louisiana Administrative Code
Title 51 - PUBLIC HEALTH-SANITARY CODE
Part XIV - Plumbing
Chapter 9 - Vents
Section XIV-921 - Stack Venting
Current through Register Vol. 50, No. 3, March 20, 2024
A. Fixture Groups. A single bathroom group of fixtures, consisting of a water closet, lavatory, shower or tub, and a kitchen sink (with disposal and dishwasher) located back-to-back to the bathroom, or two bathrooms back-to-back each consisting of one toilet, lavatory, shower or tub may be installed without individual fixture vents in a one story building or on the top floor of a building provided each fixture drain connects independently to the stack and that the tub and/or shower and water closet enter the stack at the same level and in accordance with the requirements in Table 913.A of this code. The wet vent portion of the stack vent shall be one pipe size larger than the upper fixture drain but in no case smaller than the lower fixture drain, whichever is the larger.
Figure 921.A - Stack Venting
B. Lower Floors. The lower floors of multistoried buildings may also be vented as in §921. A of this code provided that a separate wye and upright one-eighth bend is installed in the stack and that the stack group is installed above the one-eighth bend and that at least a 2-inch (51 mm) diameter vent is installed 6 inches (152 mm) above the flood level of the highest fixture in the stack group. See Figure 921.B of this code below.
Figure 921.B - Stack Venting Lower Floors
AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20).
