Which feature in hydrant caps should be checked during routine inspections?

During routine inspections of hydrant caps, it's essential to check the gaskets. Gaskets are critical components that ensure a proper seal between the hydrant cap and the hydrant body. A well-functioning gasket prevents water leaks when the hydrant is in use and also protects the internal components from dirt and debris, which can lead to malfunctions or premature wear.

If the gaskets are cracked, damaged, or deteriorated, they could compromise the hydrant's functionality and efficiency in an emergency situation. Ensuring gaskets are in good condition is vital for maintaining operational readiness and safety standards. Regular inspection helps identify potential issues before they become significant problems, ensuring the hydrant will perform effectively when needed.

While the other features mentioned, such as level bubbles, snap fittings, and air bleeder valves, have their own importance in the overall maintenance and functionality of hydrants, they do not have the same direct impact on the immediate sealing and operability that gaskets do.