How should the drain line be connected to ensure compliance with health standards?

The drain line should be connected using an air gap to ensure compliance with health standards. An air gap is a physical separation between the end of the drain line and the wastewater receptacle. This method prevents any potential back-siphonage of contaminated water into the potable water supply, which is crucial for maintaining safe drinking water standards.

By implementing an air gap, any wastewater or contaminants that may flow back into the system cannot reach the clean water supply, thus significantly reducing the risk of cross-contamination. This method is recognized and often required by plumbing codes and health standards due to its effectiveness in safeguarding public health.

Other connection methods, such as a direct connection or using flexible tubing, do not provide the same level of protection against backflow. While a backflow preventer is another viable method to protect against contamination, it may involve additional requirements and maintenance that an air gap does not. The air gap remains the simplest and most effective solution to ensure compliance with health standards regarding drain line connections.