Which component of an onsite wastewater system does not have a capacity less than 1000 gallons?

The grease trap is designed to intercept and separate fats, oils, and greases from wastewater before it enters the septic system. Unlike other components of an onsite wastewater system, which often have specific capacity regulations, grease traps can vary significantly in size, especially in commercial applications where large volumes of grease are generated, such as in restaurants. In such cases, grease traps may indeed have capacities that exceed 1,000 gallons to effectively handle the flow and prevent clogging of the sewer lines.

In contrast, septic tanks are typically designed to hold a maximum capacity of 1,000 gallons or more, while drain fields and drainage ditches have different functional requirements and are focused on soil absorption and water flow, rather than storage capacity. Understanding the specific roles and size requirements of these components is crucial for anyone working in the field of onsite wastewater management.