Where should a fill pipe terminate in relation to a building opening?

The correct answer is that the fill pipe should terminate at least 2 feet away from any building opening. This requirement is in place to ensure safety and prevent the potential for hazardous vapors or liquids to enter the building. When a fill pipe is too close to an opening, any overflows or leaks could allow harmful substances to infiltrate the interior spaces, posing health risks to occupants and potentially leading to fire or explosion hazards due to the presence of flammable materials.

Additionally, this distance provides a buffer zone that helps to minimize the risk of accidental exposure. Having a standard distance like 2 feet ensures consistency in installations and compliance with safety codes, which prioritize the wellbeing of individuals in and around the building environment.

Thus, terminating the fill pipe at a minimum of 2 feet from building openings is a critical safety measure that adheres to established regulations and best practices within the mechanical code.