What type of recovery equipment typically requires only one service connection?

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Multiple Choice

What type of recovery equipment typically requires only one service connection?

Explanation:
Self-contained recovery units are built with the recovery machinery inside one portable unit, so you can pull refrigerant through a single service connection to the appliance being serviced. The unit includes its own compressor, condenser, and storage, which means it doesn’t need a second line to access the other side of the system or rely on an external recovery pump. As a result, only one service hose is typically required to recover refrigerant, unlike open-system or dual-valve/centralized setups that need connections to both high- and low-pressure sides or multiple lines. This is why they are the best answer here.

Self-contained recovery units are built with the recovery machinery inside one portable unit, so you can pull refrigerant through a single service connection to the appliance being serviced. The unit includes its own compressor, condenser, and storage, which means it doesn’t need a second line to access the other side of the system or rely on an external recovery pump. As a result, only one service hose is typically required to recover refrigerant, unlike open-system or dual-valve/centralized setups that need connections to both high- and low-pressure sides or multiple lines. This is why they are the best answer here.

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