Texas plumbing code: which edition applies and what it requires

Does Texas use the IPC or the UPC?

Both. Texas adopts the IPC and the UPC statewide as the minimum, and each municipality chooses which one to enforce.

Larger cities differ: Dallas, Fort Worth, and San Antonio generally use the IPC; Austin uses the UPC; Houston has been mixed. Confirm your city's adopted code before relying on a section number.

What edition of the plumbing code does Texas use, and when did it take effect?

Texas's current edition is 2018 IPC + 2018 UPC, effective 2018-08-29 (amended 2021-06-16, 2023-02-16), adopted by the Texas State Board of Plumbing Examiners (TSBPE); Tex. Occ. Code 1301.255 / 22 TAC 367.2.

Codes update on a multi-year cycle, and an adopted-but-not-yet-effective edition can circulate near a changeover. Confirm which edition your project falls under by its permit date and your local jurisdiction.

How do local jurisdictions affect Texas's plumbing code?

Texas's code is the statewide baseline, but local jurisdictions enforce it and may add amendments. The local authority having jurisdiction (AHJ) resolves how it applies to a specific project.

Statewide dual adoption; municipalities pick IPC or UPC + may amend for local concerns. Confirm any local amendments and the accepted trap-seal methods with your city or county building department before relying on a provision.

Does the plumbing code vary by city in Texas?

Yes. Key jurisdictions in Texas can differ, so the adopted code or edition changes from one city or county to the next.

Texas cities choose their model code: Dallas, Fort Worth, and San Antonio generally enforce the IPC; Austin enforces the UPC; Houston has been mixed. Confirm the adopted code with the specific city's building department.

Pin down the exact jurisdiction before you specify or install, since the model code, edition, and amendments can differ between neighboring cities.

What does the plumbing code require for floor drains and trap seals?

Floor drains rely on a trap, and the code requires that trap seal to be maintained. A floor drain that receives little water can lose its seal to evaporation, which opens a path for sewer gas, odors, and pests.

To prevent that, codes recognize trap seal protection methods. The two most common are a trap seal primer (which adds water to the trap) and a barrier-type floor drain trap seal protection device (which provides a mechanical seal). The right approach depends on the drain, the space, and the AHJ.

In Texas, the exact section depends on your city's chosen code: IPC Section 1002.4.1 or UPC Section 1007. Both 2018 editions Texas adopts include the barrier-type ASSE 1072 method.

Are barrier-type (ASSE 1072) trap seals allowed under Texas's code?

Yes, and how it is cited depends on your city's code. Under the IPC a barrier-type device is a code-listed alternative (IPC 1002.4.1.4); under the UPC it is a recognized method (UPC 1007.8). Both Texas-adopted editions include the provision.

ASSE 1072 is the standard titled "Performance Requirements for Barrier Type Floor Drain Trap Seal Protection Devices." A device that meets it provides a mechanical one-way seal that lets water drain and closes when flow stops. Acceptance for a specific project rests with the local AHJ.

Do I need a permit to add a floor-drain trap seal in Texas?

Usually not for the device itself, but always confirm with your local authority having jurisdiction.

A drop-in barrier-type trap seal device generally does not require a plumbing permit because it does not alter any piping, similar to changing a drain grate. On new construction or an already-permitted renovation, include it in the plumbing specifications.

In Texas, plumbing permits and inspections run through Texas State Board of Plumbing Examiners and the local building department, and a licensed plumber pulls permits for plumbing work. Licensing rules and reciprocity vary, so confirm them with the authority or your local jurisdiction.

Where can I read Texas's plumbing code?

The adopting authority and code text are linked below. Always confirm current requirements against the adopted code and your local AHJ.

• texas.public.law/statutes/tex._occ._code_section...
• www.law.cornell.edu/regulations/texas/22-Tex-Adm...
• up.codes/viewer/texas/ipc-2018