How far must liquid fuel vent pipes terminate outside of a building from any building opening?

The correct distance for liquid fuel vent pipes to terminate outside a building, from any building opening, is 2 feet. This requirement is primarily designed for safety reasons. By ensuring that the vents are positioned at least 2 feet away from any openings, such as windows or doors, it reduces the risk of fuel vapors, which may be toxic or flammable, entering the building. This distance helps maintain a safe environment inside by preventing any potential hazards associated with the accumulation of fuel vapors, especially in residential or commercial areas where people are present. Additionally, local codes and standards typically emphasize the importance of these clearances to promote fire safety and to ensure adequate ventilation away from occupied spaces.