Completely eliminate refrigerant loss during connection with this great little valve tool
This excellent valve tool allows you to connect to a system without any refrigerant loss.
The control valve allows you to depress the system Schrader only once fully connected preventing any refrigerant escape even on the high pressure side.
Additionally it allows fine control of refrigerant flow through the access fitting and acts as a shut off valve for your hose line,
Once finished you can close the system Schrader and seal the hose line before you disconnect.