Alabama Contractors License Practice Exam

How far must an open vent terminal from a drainage system be located beneath any door?

1. 1 foot

2. 2 feet

3. 3 feet

4. 4 feet

The correct answer is: 2 feet

The correct answer indicates that an open vent terminal must be located at least 2 feet away from any door. This requirement is crucial for ensuring proper ventilation and to prevent foul odors or harmful gases from entering enclosed spaces, particularly through doorways. The 2-foot distance helps to create a clear barrier that mitigates the risk of vent discharge overwhelming the air quality within the building. When open vent terminals are too close to doors, they can inadvertently direct sewer gas or unpleasant odors directly into the living environment, which can create a health hazard and negatively impact indoor air quality. Furthermore, maintaining this standard is part of building codes that aim to ensure safety and comfort in residential and commercial spaces. Following such regulations allows for proper environmental control and assures compliance with local building standards.