Rhode Island plumbing code: which edition applies and what it requires
Rhode Island uses the International Plumbing Code (IPC). The current edition is 2021 IPC, effective 2025-12-01 (prior ed 2022-02-01), adopted by the RI Building Code Standards Committee / State Building Code Commission and enforced by the local authority having jurisdiction (AHJ).
Rhode Island plumbing code at a glance
| Adopted code | RISBC-3 Rhode Island Plumbing Code (510-RICR-00-00-3), 2021 IPC base |
|---|---|
| Code family | IPC (trap-seal carve-out) |
| Current edition | 2021 IPC |
| Effective date | 2025-12-01 (prior ed 2022-02-01) |
| Adopting authority | RI Building Code Standards Committee / State Building Code Commission |
| Trap seal protection | Trap seals must be maintained; the adopted code does not separately name barrier-type (ASSE 1072) devices. |
| Waterless trap seal acceptance | Rhode Island's adopted code does not name barrier-type (ASSE 1072) devices. A barrier device is accepted as an alternative method at the AHJ's discretion; present the device's cUPC / ASSE 1072 listing. |
| Local amendments / enforcement | Statewide; RI DELETES IPC 1002.4.1-1002.4.4 (trap-seal protection hierarchy) |
This page summarizes how Rhode Island adopts and applies its plumbing code. It is a reference for planning, not legal or code-compliance advice. Always confirm current requirements with the adopted code text and your local AHJ.
Does Rhode Island use the IPC or the UPC?
Rhode Island uses the IPC. Its plumbing code is based on the International Plumbing Code.
The adopted edition matters here: 2021 IPC. The edition determines whether newer provisions (such as the barrier-type trap seal device) are present (see below).
What edition of the plumbing code does Rhode Island use, and when did it take effect?
Rhode Island's current edition is 2021 IPC, effective 2025-12-01 (prior ed 2022-02-01), adopted by the RI Building Code Standards Committee / State Building Code Commission.
Rhode Island's current plumbing code edition took effect December 1, 2025, replacing the prior edition (effective February 1, 2022).
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 Rhode Island's plumbing code?
Rhode Island'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; RI DELETES IPC 1002.4.1-1002.4.4 (trap-seal protection hierarchy). 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.
Rhode Island adopts the IPC but deletes the trap-seal-protection subsections (1002.4.1 through 1002.4.4), so its code does not name a barrier-type / ASSE 1072 device; a barrier device is handled as an AHJ alternative method.
Are barrier-type (ASSE 1072) trap seals allowed under Rhode Island's code?
Not by name. Rhode Island deletes the IPC's trap-seal-protection subsections (1002.4.1 through 1002.4.4), so the adopted code does not name ASSE 1072 barrier devices.
That does not prohibit a barrier-type device; it means acceptance is an alternative-materials-and-methods decision made by the local AHJ. Present the device's cUPC and ASSE 1072 listing to the AHJ, and lean on the evaporation / preventive-maintenance rationale. Do not rely on a code-compliance claim here.
Do I need a permit to add a floor-drain trap seal in Rhode Island?
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 Rhode Island, plumbing permits and inspections run through RI Building Code Standards Committee 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 Rhode Island's plumbing code?
The adopting authority and code text are linked below. Always confirm current requirements against the adopted code and your local AHJ.
Where Green Drain fits. Green Drain is a barrier-type waterless trap seal for floor drains, cUPC listed through IAPMO (File No. 9301) and tested to ASSE 1072-2020. For a floor drain at risk of a dry trap, it is one option to keep the trap seal intact, and it works alongside the existing P-trap rather than replacing it. Confirm acceptance with your local AHJ.
Acceptance for any specific installation rests with your local AHJ. See Green Drain certifications for listing details, or browse waterless trap seals by drain size.
Protecting floor drains in Rhode Island?
Find the right waterless trap seal for your drain size, or talk to our team about a project.