Arizona Plumbing Practice Exam

What is the minimum height a gas water heater pilot light must be above the garage floor?

1. 12 inches

2. 18 inches

3. 24 inches

4. 30 inches

The correct answer is: 18 inches

The minimum height a gas water heater pilot light must be above the garage floor is established to prevent any potential ignition of gas fumes that may accumulate in a garage environment. Garages often contain various fuel sources, and their design frequently allows for volatile vapors to settle near the ground. By requiring that the pilot light be positioned a minimum of 18 inches above the floor, building codes help ensure that the flame is safely elevated above the level where combustible gases are most likely to accumulate. This height acts as a safeguard, reducing the risk of accidental ignition and protecting both property and individuals. This standard is crucial for maintaining safety in residential structures, especially in areas where appliances like gas water heaters are used. It also aligns with widely accepted building codes and safety regulations, ensuring that gas appliances are installed with adequate safety measures in mind.