What is the minimum height requirement for a drain pan?

The minimum height requirement for a drain pan is set at 1-1/2 inches to ensure that it can effectively catch and channel water away without risk of overflow under normal operating conditions. This height provides a sufficient volume to hold accumulated water from potential leaks or condensation, thereby preventing any damage to surrounding areas or equipment. Adequate height in drain pans is particularly important in areas with high moisture, as it allows for effective drainage while also meeting plumbing code standards that help protect both property and safety.

Other options may not provide the necessary capacity to manage water effectively, leading to potential overflow and damage. Therefore, the specification of 1-1/2 inches is both a practical and a code-compliant choice for drain pan installation.