When a drain pan for a water heater extends to the exterior of a building, it should terminate at a minimum of how many inches above the adjacent ground surface?

• A. 4 inches
• B. 6 inches
• C. 10 inches
• D. 12 inches

Answer: (B)

When a drain pan for a water heater extends to the exterior of a building, it is essential for the termination point to be positioned a minimum of 6 inches above the adjacent ground surface. This requirement is designed to prevent water from pooling around the base of the structure. Keeping the drain pan elevated helps to ensure that any water released from the water heater will flow away from the foundation and reduces the risk of water damage, erosion, or creating a conducive environment for pests. By meeting this height requirement, the drainage system effectively manages potential leaks and enhances the overall safety and integrity of the building.