The International Association of Plumbing and Mechanical Officials has been protecting the public’s health and safety for ninety three years by working in concert with government and industry to implement comprehensive plumbing and mechanical systems around the world.

As a membership-based association, IAPMO is proud to utilize an open consensus process in the development of our flagship Uniform Plumbing Code® and Uniform Mechanical Code®. These codes are established through scientific research, debate, and analysis, strengthening our position at the forefront of the plumbing and mechanical industries.

The IAPMO Group is a complete service organization, providing code development assistance, industry-leading education, plumbing and mechanical product testing and certification, building product evaluation and a manufacturer-preferred quality assurance program. Each component of the IAPMO Group works toward playing an integral part in protecting the health of people everywhere.



Responding to a request, we are making some of the online Answers and Analysis offered only to IAPMO members available here.

1. Are we to assume that furnaces shall no longer be installed in underfloor spaces for new construction? We are a little confused on the reasoning for deleting these requirements when replacing or installing furnaces in crawl spaces. If underfloor furnaces are still allowed, what code requirements do we use? 2. Is there a particular reason(s) that IAPMO does not recognize factory-built, listed, wood-burning fireplaces? 3. If the 2006 UMC does not address the past requirements of "return air," especially prohibited locations, what resource does IAPMO rely on for these requirements?