System-dependent or passive recovery equipment captures refrigerant into what kind of container?

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System-dependent recovery relies on the refrigerant’s own pressure from the appliance to push the gas into a receiver that is not pressurized by the recovery unit. Because no additional pressure is applied by the device, the collection container must be a non-pressurized receiver. Using a pressurized vessel would require the recovery system to maintain or manage high pressure, which isn’t how passive recovery works. A bag under atmospheric pressure isn’t a durable or compliant option for refrigerant recovery, and a sealed high‑pressure vessel isn’t used in this passive method. So the refrigerant is captured into a non-pressurized container.