Get the latest research from IAPMO
IAPMO research advances regulations and provides guidance on plumbing and mechanical systems. Our staff and volunteers — many times in partnership with communities or other professional organizations — collaborate on solutions to issues affecting health and environmental impacts of plumbing, mechanical, alternative energy, and water systems, and how they affect our daily lives.
IAPMO MANUAL 4-2024
This manual provides education and guidance to help plumbers and other personnel responsible for the design, construction and commissioning of water systems reduce the likelihood of contaminating plumbing systems during construction. If unmanaged, construction and commissioning activities contribute to the growth and spread of opportunistic premise plumbing pathogens (OPPPs) in potable and nonpotable building water systems.
IAPMO MANUAL 3-2024
Designed for easy adoption by AHJs, this manual provides actionable guidance language for hydrogen gas piping written in enforceable language to ensure safety and compliance at every level. It includes pipe-sizing tables and annex materials developed for hydrogen fuel gas admixtures. In addition to serving as a practical resource, the manual features key excerpts from the Uniform Plumbing Code (UPC®) and Uniform Mechanical Code (UMC®), underscoring the vital standards that ensure hydrogen fuel piping is installed correctly and safely.
IAPMO MANUAL 2-2023
This manual serves as a guide in assessing medical gas flow rates associated with varying pressures. Since the pandemic, the medical gas piping systems were stretched to their limits resulting in insufficient flow rates and pressures at patient outlets, due in part to undersized lines for elevated flow rates. The pandemic required facilities to alter their medical gas pressures for medical air and oxygen. This document will assist you in evaluating the medical gas systems and flow rates for temporary operations at elevated pressures.
IAPMO MANUAL 1-2023
The intent of this manual is to provide clarification of procedures for the design and approval of all gender toilet facilities not specifically covered in other parts of the Plumbing or Building Code, particularly when it comes to health, safety, privacy, and security needs.
IAPMO MANUAL 0-2022
This Manual shall apply to risk management practices for all potable and non-potable water supply systems during normal operation, when closing, during interruptions to normal operation, and when reopening building water systems in specific occupancy types. Section 4 shall apply to potable water systems, nonpotable water systems, and mechanical systems. Section 5 shall apply to potable water systems. Section 6 shall apply to nonpotable water systems. Section 7 shall apply to mechanical systems.