Firstly a refrigerant can be understood as a substance or blend, utilized in a warmth siphon and refrigeration cycle. In most of the cycles, it experiences stage changes from a fluid to a gas and back once more. Many working liquids have been utilized for such kind of purposes. Fluorocarbons, particularly chlorofluorocarbons, wound up typical in the twentieth century, yet they are being eliminated in view of their ozone consumption impacts. Other normal refrigerants that are utilized in different applications are smelling salts, sulfur dioxide, and non-halogenated hydrocarbons, for example, propane, etc. But now the major concern is that How we can remove refrigerant from Car AC or other HVAC devices?