Ontario, Calif. — IAPMO® has released Peak Water Demand Study: Full Study, a comprehensive analysis redefining water supply system sizing for residential and multi-family buildings. Based on real-world data from more than 1,000 households, the full study provides an evidence-based approach to right-sizing plumbing systems — demonstrating reductions in water waste, construction costs, and public health risks.
A revolutionary tool, IAPMO’s Water Demand Calculator® accurately predicts peak water demand in single-family homes and multi-family buildings. Right-sizing of the piping system helps decrease construction costs, reducing the carbon footprint of the structure and saving consumers on both their water and water heating-related energy utility bills for the entire life of the plumbing system. At the same time, right-sizing has the potential to reduce the threat of bacterial growth within the system, which can lead to such serious health risks as Legionnaires’ disease.
Key parts of the study include:
“By leveraging real-world data, this study not only proves that right-sizing plumbing systems can reduce water waste and construction costs, but it also plays a crucial role in enhancing public health and minimizing environmental impact,” said Dan Cole, senior director of Technical Services and Research. “We’re excited to offer the Water Demand Calculator as a revolutionary tool that will empower builders, designers and consumers to make smarter, more sustainable choices for the future.”
IAPMO encourages plumbing professionals, regulators, and builders to adopt these findings. The study supports the expanded use of the Water Demand Calculator, already implemented in multiple states and jurisdictions.
Access the full study at https://iapmo.org/research/whitepapers-and-studies/peak-water-demand-full-study.
Ontario, California — IAPMO®, a global team of experts engaging industry and government for a safer built environment, is proud to announce that its Water Demand Calculator® has been featured as a key recommendation in the Pacific Institute’s new landmark report, “Untapped Potential: An Assessment of Municipal and Industrial Water Efficiency Potential in the United States.”
IAPMO® is proud to be a diamond sponsor and administrating organization at the 2025 ANSI Innovation Summit this week. Formerly World Standards Week, the ANSI Innovation Summit is an annual event that convenes the Institute's members and private- and public-sector stakeholders from across the standards and conformity assessment communities to come together, learn from each other, and showcase their important work.
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