Louisiana Administrative Code
Title 51 - PUBLIC HEALTH-SANITARY CODE
Part XIV - Plumbing
Chapter 9 - Vents
Section XIV-913 - Fixture Vents
Current through Register Vol. 50, No. 3, March 20, 2024
A. Distance of Trap from Vent. Each fixture trap shall have a protecting vent so located that the slope and the developed length (see Figures 913.A and 913.C of this code) in the fixture drain from the trap weir to the vent fitting are within the requirements set forth in Table 913.A of this code, except as permitted by §923. A of this code. For water closets or other floor or wall mounted fixtures having an integral trap, the developed length shall be the distance from the internal vent opening to the face of the flange to which the fixture is bolted or otherwise fastened.
|
Table 913.A Distance of Fixture Trap from Vent |
|||
|
Size of Fixture Drain (in) |
Size of Trap (in) |
Fall (in/ft) |
Max. Distance From Trap |
|
1 1/4 |
1 1/4 |
1/4 |
3 ft 6 in |
|
1 1/2 |
1 1/4 |
1/4 |
5ft |
|
1 1/2 |
1 1/2 |
1/4 |
5ft |
|
2 |
1 1/2 |
1/4 |
6ft |
|
2 |
2 |
1/4 |
6ft |
|
3 |
3 |
1/8 |
10ft |
|
4 |
4 |
1/8 |
12ft |
Figure 913.A - Distance of Fixture Trap from Vent
B. Trap Seal Protection. The plumbing system shall be provided with a system of vent piping which will permit the admission or emission of air so that under normal and intended use the seal of any fixture trap shall not be subjected to a pressure differential of more than 1-inch of water (249 Pa).
C. Location of Vent Opening. The internal vent pipe opening from a soil or waste pipe, except for water closets and similar fixtures, shall not be below the top weir of the trap's outlet.
Figure 913.C - Location of Vent Opening
D. Crown Vent. A vent shall not be installed within 2 pipe diameters of the trap weir (see §1001. E.4 of this code).
AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20).
