Grease interceptors are necessary for what type of wastewater lines?

Grease interceptors are specifically designed to handle wastewater that contains high levels of fats, oils, and grease, which are commonly generated in commercial kitchens. These establishments often deal with significant amounts of food preparation waste that can lead to clogs in municipal sewer systems if not properly managed. The purpose of grease interceptors is to separate these substances from the wastewater before it enters the sewage system, thus preventing blockages and reducing the risk of hazardous wastewater backups.

In contrast, residential kitchens may generate some grease waste but typically not at the same volume or concentration as commercial kitchens, making grease interceptors less critical in that context. Industrial wastewater treatment varies widely depending on the industry, and while some might need pretreatment, they do not necessarily use grease interceptors specifically. Agricultural drains are designed to handle runoff from agricultural activities, which usually doesn't include the concentrated grease found in kitchen waste. Hence, the focus on commercial kitchens as the primary users of grease interceptors is correct.