How should the drain line of an ice machine be connected to the sewer system?

The correct approach for connecting the drain line of an ice machine to the sewer system is through an open receptacle with an air gap. This method is crucial for preventing contamination and ensuring safe operation.

The air gap serves as a physical separation between the water in the drain line and the sewage system. This separation is vital in preventing backflow, which could introduce harmful contaminants or pathogens into the ice machine and subsequently into the ice produced. By having an open receptacle with an air gap, you ensure that any wastewater or potentially contaminated water can't siphon back into the ice machine.

Using other methods, such as a direct connection with PVC pipe or through a closed receptacle, does not provide the same level of protection against potential contamination. A standard trap alone doesn’t suffice either, as it may not completely prevent backflow. The air gap, therefore, is a critical component in maintaining food safety standards and preventing any health risks associated with ice production.