According to ABYC, which of the following considerations is NOT required for evaporator condensate drains?

The correct choice highlights that the diameter of the drain is not a specified requirement by ABYC for evaporator condensate drains. Instead, the focus is on ensuring effective water management and preventing issues associated with condensate drainage.

For evaporator condensate systems, it is essential to implement features such as P-traps, which serve to prevent unwanted gases, including carbon monoxide, from entering the living spaces of the vessel. Additionally, proper routing of the drain is critical; for instance, drains should not enter a bilge area that is shared by an engine, as this could lead to contamination or backflow issues.

Another important aspect is the orientation of the containment pan, which should be designed to promote complete drainage of any condensate, thereby reducing the risk of water accumulation and potential damage or mold growth.

Thus, while considerations like P-traps, suitable drainage locations, and pan orientation are necessary for safety and system functionality, the specific diameter of the drain itself is not mandated, allowing for some flexibility in design and installation.