When are drain pans required for water heaters?

Drain pans are specifically required for water heaters when there is a risk of damage from leaking heaters. This scenario is particularly pertinent in situations where the heater is installed in areas that could suffer significant water damage if a leak were to occur, such as in attics, upper floors, or near electrical systems. The pan acts as a protective measure, ensuring that any potential leaks are captured and directed safely away from sensitive areas, minimizing water damage and associated risks.

In essence, the requirement for drain pans is based on the need to mitigate potential hazards arising from leaks that could occur due to factors like corrosion, wear and tear, or improper installation. Hence, while drain pans may not be mandated in all circumstances, they become essential wherever the potential for damage from leakage exists, ensuring safety and protection for both the property and its occupants.