All new commercial kitchen grease interceptors shall be connected to which of the following?

The correct answer is that all new commercial kitchen grease interceptors shall be connected to the building drain or sewer. This connection is essential because grease interceptors are designed to capture and separate fats, oils, and grease (FOG) from waste water before it enters the sewer system. By connecting the grease interceptor to the building drain or sewer, you ensure that the treated wastewater—free from harmful FOG—can flow properly into the municipal sewer system without causing clogs or backups.

Connecting to the storm sewer would not be appropriate, as storm sewers are designed to handle rainwater and not wastewater from kitchens, which can lead to environmental contamination. Similarly, while a sampling manhole might be useful for testing wastewater quality, it does not serve as an appropriate connection point for grease interceptors, which require a direct link to the building's plumbing drainage system to function effectively. Therefore, the connection to the building drain or sewer is critical for proper operation and compliance with health and sanitation regulations.