Phoenix, AZ — The city of Phoenix has announced adoption of the 2024 Phoenix Building Construction Code, which incorporates the 2024 edition of IAPMO’s Uniform Plumbing Code (UPC®) and its Appendix M: the Water Demand Calculator — a breakthrough tool for modern plumbing design.
Implementation of the new code will begin Aug. 1, giving industry professionals time to prepare for the transition and align their practices with the latest safety and sustainability standards.
“The Uniform Plumbing Code and the Water Demand Calculator empower plumbing professionals to design right-sized systems that reduce construction costs, conserve water, and deliver hot water more efficiently,” said IAPMO CEO Dave Viola. “We applaud Phoenix for taking this important step toward building a more resilient, equitable, and sustainable city.”
Matthew Miles, P.E., with the city of Phoenix, added, “Adopting the 2024 Uniform Plumbing Code helps ensure industry professionals in Phoenix can rely on a clear, consistent, and modern set of requirements that support safety and constructability.”
The Water Demand Calculator, now codified in Appendix M of the UPC, uses statistical modeling of real-world water use to accurately predict peak demand for residential buildings. This innovation allows for dramatically smaller pipe diameters without compromising performance — improving energy efficiency, water quality, and cost savings over the life of the system.
Key benefits of Phoenix’s adoption of the 2024 UPC and Water Demand Calculator include:
ASSE International is seeking subject matter experts and industry stakeholders to participate in a working group for the development of a proposed new professional qualification standard: ASSE 18000, Professional Qualifications Standard for Fuel Gas Systems and Equipment Installers and Repairers.
IAPMO® is proud to announce that Dain Hansen, executive vice president of Government Relations, has been named one of The Hill’s Top 100 Lobbyists of 2025. This marks Hansen’s fourth consecutive year on this prestigious list, highlighting his continued leadership and IAPMO’s influence on public policy affecting codes, standards, and the built environment.
IAPMO®, developer of the Uniform Plumbing Code (UPC®) and Uniform Mechanical Code (UMC®), has posted online the timeline for the development of the 2030 editions of these prospective American National Standards.