Why should charging hoses not be used for evacuation?

Charging hoses should not be used for evacuation because they are typically not designed to handle the vacuum conditions required during the evacuation process. They may contain impurities or moisture that can contaminate the system, leading to inefficiencies or damage. Additionally, their construction may not withstand the pressures involved, potentially resulting in leaks or failures. Using proper evacuation hoses ensures safety and the integrity of the refrigeration system.