What happens if a plumbing trap gets dry?
A dry plumbing trap allows sewer gases and odors to enter the building (Option A).
Why Option A is Correct?
The water seal in a plumbing trap prevents sewer gases from escaping.
If the trap dries out, it no longer blocks odors, which can cause indoor air quality issues.
IFMA's Operations & Maintenance Core Competency emphasizes proper plumbing maintenance to prevent health hazards.
IFMA Core Competency: Operations & Maintenance -- Plumbing system maintenance.
Source: IFMA Building Systems Guide (IFMA, 2023).