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IAPMO Code Change Monographs Now Available

April 1, 2021
The monographs from Technical Committee meetings are available for download.

ONTARIO, CA – The International Association of Plumbing and Mechanical Officials (IAPMO) has made the 2021 Uniform Plumbing Code (UPC®) and Uniform Mechanical Code (UMC®) Technical Committee (TC) meeting monographs available for download. These monographs will be used at the upcoming TC meetings in May.

Attendees will be required to register in order to participate. Guests wishing to address the TC shall notify the staff liaison in writing at least seven days before the webinar meetings. If you wish to address the TC, please notify the staff liaison at [email protected] with your name, representation, and proposal item number. 

The Uniform Plumbing Code (UPC) Technical Committee virtual meeting is scheduled for May 3-7, starting at 8 a.m. PDT and ending at noon each day, Monday-Friday. Register in advance for this webinar:


The Uniform Mechanical Code (UMC) Technical Committee virtual meeting is scheduled for May 17-21, starting at 8 a.m. PDT and ending at noon each day, Monday-Friday. Register in advance for this webinar:


The chairperson reserves the right to extend the times as needed to complete the required minimum number of proposals.

All individuals anticipating an active role in the ANSI-accredited consensus development of the Uniform Codes will want to download these documents in Adobe PDF format from the following URLs:

UPC: https://codes.iapmo.org/docs/2024/UPC/2021%20UPC%20TC%20Meeting%20Monograph.pdf

UMC: https://codes.iapmo.org/docs/2024/UMC/2021%20UMC%20TC%20Meeting%20Monograph.pdf

Hardcopy versions will not be available.

The monographs contain every code change proposal submitted for the 2024 editions of the UPC and UMC as part of the American National Standards Institute (ANSI)-accredited consensus code development process employed by IAPMO.

Topic areas for proposed changes to the UPC include: new referenced standards for plumbing fixtures; introduction of new novel products; temperature limitations of fixtures; condensate waste; seismic provisions for plumbing piping; material requirements for water supply and distribution systems; freeze protection; water softeners and water treatment devices; material requirements for drain, waste and vent piping and fittings; backflow prevention devices; sewer cleanouts; rehabilitation provisions for building sewer and sewer lateral piping; fuel gas provisions; storm drain material requirements; gray water provisions; engineered roof drainage provisions; circuit venting provisions; healthcare facilities; professional qualification requirements; legionella risk management provisions; onsite blackwater treatment systems; onsite stormwater treatment systems; private sewage disposal systems; non-sewered sanitation systems; new provisions for tiny houses; composting toilets and urine diversion systems;  and requirements for normal operation, interruption to normal operation and reopening of plumbing system.

Topic areas for proposed changes to the UMC include: Installation requirements for listed appliances; requirements for roof installations of equipment and appliances; clearance requirements for equipment and appliances; condensate control; various ventilation and exhaust system requirements; smoke control systems; environmental and product conveying air ducts; Type I and Type II hoods; various provisions for air ducts such as fibrous glass ducts, fabric air dispersion system, and plastic ducts; air balancing and air filtration requirements; legionella risk management provisions; decorative appliances; air conditioning systems; refrigeration systems (including A2L); various hydronic system provisions; fuel gas piping material and fitting requirements and test pressure; various fireplace provisions; ventilation requirements for health care facilities; district geothermal energy systems provisions; cannabis and horticultural facilities; professional qualifications; and requirements for normal operation, interruption to normal operation and reopening of cooling towers.

For specific information about the UPC TC, please contact Enrique Gonzalez at (909) 230- 5535 or e-mail your question to [email protected]. For the UMC TC, contact Zalmie Hussein at (909) 218-8122 or e-mail your question to [email protected].

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