CODE DEVELOPMENT
IAPMO Codes are developed in accordance with an American National Standards Institute (ANSI) accredited development process
NOTICE: We are currently experiencing a system outage that is affecting access to several of our services. We apologize for any inconvenience this may cause and appreciate your patience and understanding during this time. If you require immediate assistance, please contact us at codes-dept@iapmo.org.
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.
A notice of intent to file a petition to the IAPMO Board of Directors has been timely filed with the Secretary which relates to the 2027 Uniform Mechanical Code. Click here to view
The 2030 UPC/UMC Code Development Timeline is now available for download.
Click here to view decisions
All Notices of Intent to File a Petition from decisions of the Standards Council are due, via email, by December 17, 2025. If you are requesting a hearing, please include that in request in your Notice of Intent by December 17, 2025. All written petitions are due by January 5, 2026.
The Regulations Governing Petitions to the Board of Directors of the Standards Council govern the petitions process. Please take note of Section 6 - Filing and Contents of the Petition, and Section 8 - Requests for Hearings.
All timely and properly submitted petitions will be posted to the IAPMO website notifying interested parties of their ability to submit a written response and to attend the hearing either in support of or opposition to the petition, in accordance with Section 7-2 of the Regulations noted above.
If you have any questions, please contact Hugo Aguilar. Hugo can be reached via email at Hugo.Aguilar@iapmo.org.
Submit online 2027 USPSHTC & USHGC COMMENTS - Deadline January 16, 2026
Submit online 2027 WE•Stand Comments - Deadline January 16, 2026
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.
