IAPMO has published a Formal Interpretation (FI 006) to the 2024 Uniform Plumbing Code (UPC) in accordance with Section 6-4.2 of the Regulations Governing Committee Projects.

Please note that the effective date of this formal interpretation will be 20 days from the date of this notice, unless an appeal is filed with the IAPMO Standards Council in accordance with Section 1-6 of the Governing Committee Projects.

UPC FI 006: https://codes.iapmo.org/docs/2026-09-11 FI006.pdf

The deadline to submit an appeal is Oct. 9, 2026.

The Uniform Codes are developed using IAPMO’s ANSI-accredited consensus development procedures. This process brings together volunteers representing a variety of viewpoints and interests to achieve consensus on plumbing and mechanical practices. IAPMO urges its members and other interested parties to get involved in the process to ensure effectiveness in preserving the public’s health, safety, and welfare through fair and balanced development of its codes and standards. Installers, plumbing and mechanical officials, the construction industry, engineers, and manufacturers all benefit from a cooperative effort in developing codes.

The public at large is encouraged and invited to participate in IAPMO’s open consensus code development process. A code development timeline and other relevant information are available at IAPMO’s website, https://www.iapmo.org/code-development/.