Oregon plumbing code: which edition applies and what it requires

Does Oregon use the IPC or the UPC?

Oregon uses the UPC. The Oregon Plumbing Specialty Code (OPSC) is based on the Uniform Plumbing Code with Oregon amendments.

Oregon is notable because its amendments specifically address barrier-type trap seal devices (see below), which is why Oregon is treated differently from other UPC states.

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

Oregon's current edition is 2023 OPSC (2021 UPC base), effective 2023-10-01, adopted by the Oregon Building Codes Division (BCD), DCBS; State Plumbing Board sets technical content.

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 Oregon's plumbing code?

Oregon'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 OPSC + OR amendments. Confirm any local amendments and the accepted trap-seal methods with your city or county building department before relying on a provision.

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 Oregon, the requirement is in the OPSC traps chapter (Section 1007). Oregon recognizes a barrier-type ASSE 1072 device but, by state amendment, does not allow it in lieu of the trap-primer requirement, so it is specified as supplemental protection.

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

Recognized, but as supplemental protection. Oregon's code names barrier-type devices conforming to ASSE 1072, but specifically states they shall not be used in lieu of the trap-primer requirement.

This is an Oregon-specific amendment to the UPC. In Oregon, treat a barrier-type device as added protection rather than a standalone replacement for a primer, and confirm the application with the AHJ.

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

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 Oregon, plumbing permits and inspections run through Oregon Building Codes Division 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 Oregon's plumbing code?

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

• www.oregon.gov/bcd/codes-stand/pages/plumbing.as...
• epubs.iapmo.org/2023/OPC/
• www.oregon.gov/bcd/codes-stand/Documents/21opsc-...