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.

The Uniform Plumbing Code requires water heaters generating a glow or spark or flame capable of igniting flammable vapors to be installed in a garage, provided that the pilots and burners or heating elements and switches are at least 18 inches above the floor level in residential garages. The Code further states, “when such water heaters installed within a garage are enclosed in a separate, approved compartment having access only from outside of the garage, such water heaters may be installed at floor level, provided the required combustion air is also taken from the exterior of the garage.” Would the requirements of the Code apply to a water heater located in a room adjacent to a residential garage if the door of this room opens directly into the garage?