Which of these is checked on a daily basis concerning agent tanks?

When assessing agent tanks in an ARFF (Aircraft Rescue and Firefighting) context, the primary focus is on ensuring that the pumping instruments are operating effectively. These instruments are crucial for the proper dispensing of fire suppression agents during operations. Regular checks confirm that the pumps are in good working order, that they can deliver the correct amount of agent under pressure, and that there are no leaks or mechanical failures that could compromise performance during a critical response.

Daily checks on the pumping instruments are vital, as any malfunction could severely impact the effectiveness of firefighting efforts when conditions arise that require their immediate use. Ensuring that these instruments function properly is an integral part of operational readiness and safety protocols in ARFF operations. While other systems like coolant levels, air filters, and water levels might be important for vehicle maintenance, they are not as directly related to the immediate readiness of agent tanks in firefighting scenarios.