What should be checked visually to ensure the water filters are functioning correctly?

The appropriate component to check visually to ensure that the water filters are functioning correctly is the filter condition. This involves assessing the state of the filters to determine if they are clogged, dirty, or otherwise compromised. Properly functioning filters are essential for maintaining the clarity and safety of the water being used in radiographic processes. If the filters appear dirty or damaged, they will not effectively remove impurities or particulates, which could impact the quality of the radiography results.

While aspects such as water temperature, color, or the built-in thermometer might provide some useful information regarding the overall system, they do not directly indicate whether the filtration system is working properly. Focusing on the filter condition allows for timely maintenance and ensures that the water meets the required standards for effective use in radiography.