How many inches must the yellow coloring extend down the side of recovery cylinders?

The correct answer is that the yellow coloring must extend 12 inches down the side of recovery cylinders. This requirement is established by regulations to ensure visual differentiation and identification of recovery cylinders that are designated for refrigerants. The yellow color serves as a standard indicator that helps technicians quickly recognize that the cylinder is for recovering refrigerant, which is critical for safety and compliance in handling refrigerants and preventing contamination.

The 12-inch specification is designed to ensure that the visual cue is prominent and easily seen, minimizing the chances of mistakes in handling or filling cylinders. This height is sufficient for visibility, even in potentially crowded or complex environments where multiple types of cylinders may be present.

Understanding this standard helps technicians adhere to safety protocols and reinforces the importance of proper labeling in refrigerant management practices, fostering compliance with EPA regulations.