Dissolved O₂ and CO₂ gases are fed into the system with the cauldron feeding water in the vapor cauldrons into the system.
Oxygen (O₂) is dissolved in the air and in the fresh cauldron feeding water. The water receives oxygen easily when gets in contact with air.

Carbon dioxide (CO₂) is created upon the separation of the materials constituting the temporary hardness of the raw water or changing their qualities after softening (carbonates) being picked up under heat and pressure.

These gases cause corrosion on the vapor using devices and especially installations as staining, melting and granulation. The effects of these gases increase proportionally to the rate of fresh feeding water and system operating pressure.

The cauldron feeding waters need to be degasified by passing through the degasifier device in order to be purified from O₂ and CO₂ gases.

Unless the cauldron feeding waters are purified of these gases, the lifespan of the complete system is diminished. There may be corrosion and holes in the devices and installations constituting the system, and also in the cauldron.