What color is the body of a recovery cylinder required to be?

The body of a recovery cylinder is required to be gray according to regulations established by the Environmental Protection Agency (EPA). This color designation helps standardize the identification of equipment and its purpose, which is critical for ensuring safe and proper handling of refrigerants during the recovery process.

Gray cylinders typically contain refrigerants that require careful management to prevent air pollution and are part of broader efforts to ensure environmental safety. Adhering to these color codes helps technicians quickly identify the correct equipment, enhances workplace safety, and ensures compliance with federal regulations related to refrigerant management.

Other colors, such as white, blue, or green, do not denote the specific requirements or use associated with recovery cylinders, which is why they are not appropriate choices in this context. Each color generally corresponds to different types of gas or usage guidelines, reinforcing the importance of understanding the specific codes associated with HVAC processes.