A grease reservoir with a cleanout must be provided at the base of each:

The requirement for a grease reservoir with a cleanout at the base of each vertical duct riser is grounded in the need for effective management of grease within kitchen ventilation systems. Vertical duct risers are commonly used in commercial kitchens to discharge grease-laden vapors from cooking equipment. Grease can accumulate in these ducts, creating the potential for fire hazards and airflow issues.

Having a cleanout at the base of the vertical duct riser allows for easy access to remove any built-up grease, ensuring that the duct remains clear and functions effectively. This cleanout is crucial for maintenance purposes, as it helps prevent blockages that could lead to dangerous situations. The design strives to facilitate regular cleaning, safeguarding both the building and its occupants.

Other options, such as horizontal ducts or access points, may not present the same level of risk as vertical risers in terms of grease accumulation. While cleanouts are important in various parts of a system, the specific code requirements emphasize the need for these safeguards particularly at vertical duct risers due to their unique operational characteristics and the nature of the materials they handle. Therefore, the requirement for a grease reservoir with a cleanout at the base of each vertical duct riser is essential for maintaining safety and functionality in mechanical systems within commercial