CODE DEVELOPMENT
IAPMO Codes are developed in accordance with an American National Standards Institute (ANSI) accredited development process
IAPMO Codes and Standards provides innovative codes and standards solutions for the protection of the public’s health, safety and welfare. We address the world’s codes and standards needs to improve life for a better, more resilient tomorrow.
In accordance with Section 1-6 of the Regulations Governing Committee Projects, interested parties that the deadline for submitting appeals is October 6, 2025. If you wish to file an appeal, please ensure that your documentation and relevant materials are completed and submitted by the specified cutoff date. Information concerning appeals can be located in Section 1-6 of the Regulations Governing Committee Projects.
If you have any questions about the appeals process or require assistance with your submission, please contact codes-dept@iapmo.org.
Interested parties are encouraged to download the ROC's on the following links:
Interested parties are encouraged to download the ROP's on the following links:
2025 USPSHTC REPORT ON PROPOSALS
2025 USHGC REPORT ON PROPOSALS
Interested parties are encouraged to download the ROP on the following link:
The 2027 UPC/UMC Code Development Timeline is now available for download.
The 2027 USPSHTC/USHGC Code Development Timeline is now available for download.
The 2027 WESTAND Code Development Timeline is now available for download.
The IAPMO Codes Portal connects the industry with the IAPMO code development process. IAPMO urges its members and other interested parties to get involved in the code development process to ensure effectiveness in preserving the public health, safety, and welfare through fair and balanced development of the Uniform Codes. Installers, plumbing and mechanical officials, the construction industry, engineers, and manufacturers all benefit from a cooperative effort in developing codes.
The IAPMO Codes app provides mobile access to IAPMO's published codes, such as the Uniform Plumbing Code (UPC), Uniform Mechanical Code (UMC), and others. It allows users to view their purchased code books, make annotations and voice recordings, and access code-related information, even offline. The app also facilitates engagement with the code development process, including access to timelines, notifications, and contact information for technical staff. 
With its Uniform Plumbing Code; Uniform Mechanical Code; Uniform Solar, Hydronic and Geothermal Code; Uniform Swimming Pool, Spa and Hot Tub Code; and Water Efficiency and Sanitation Standard (WE•Stand) designated as American National Standards, IAPMO is proud to utilize an open consensus process accredited by the American National Standards Institute (ANSI) in its code development practice.
Click here to learn more about the IAPMO Codes and Standards development process.
(Four Step Process)
(Three Step Process)
IAPMO gathers the largest assembly of plumbing and mechanical experts in the world at its annual education and business conference, where anyone — members and non-members alike — can have a voice on proposed changes to the code.
The purpose of the IAPMO code development process is to ensure the continued development and maintenance of the Uniform Codes with the following goals in the forefront:
IAPMO urges its members and other interested parties to get involved in the code development process to ensure that these goals are maintained. Installers, plumbing and mechanical officials, the construction industry, engineers, and manufacturers all benefit from a cooperative effort in developing codes.
