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:
In a recent Green Fire Times op-ed, Christoph Lohr, P.E., IAPMO vice president of technical services and research, makes the case that New Mexico is well-positioned to become a national leader in building-level water conservation. Lohr highlights Santa Fe’s proven conservation success, the state’s long-term water challenges, and the need for practical code solutions that help buildings reduce water demand while protecting public health.
ASSE/IAPMO/ANSI/CAN Series 22000-2026, Professional Qualifications Standard for Water Treatment Equipment Personnel, has been designated as an American National Standard by the American National Standards Institute (ANSI) and a National Standard of Canada by the Standards Council of Canada (SCC), and is now available for purchase in both English and French.
ARCSA International® has announced the launch of its Rainwater Harvesting System Certification Program, a comprehensive in-field certification program designed to verify that rainwater harvesting systems are designed, installed, and operating in compliance with ARCSA/ASPE/ANSI Standard 63.