Automatic air tanks _________.

Automatic air tanks encompass all of the listed answers.

1. They are available with electric heating devices: Some automatic air tanks are equipped with electric heating devices to help prevent the moisture in the compressed air from freezing during cold weather conditions. These heating devices ensure that the air remains free from ice, maintaining the functionality of the air brake system.

2. They automatically expel water and oil: Automatic air tanks feature built-in mechanisms that facilitate the automatic expulsion of water and oil. These mechanisms help remove moisture and contaminants from the air brake system without requiring manual intervention.

3. They may be equipped with manual draining: While automatic air tanks have mechanisms for automatic water and oil expulsion, they may also have provisions for manual draining. Manual draining allows for additional maintenance and ensures the removal of any remaining water or oil that the automatic mechanisms may not fully eliminate.