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When attached to an access fitting, the “Sure-Seal” retaining coupler CD2037 automatically open and depresses the valve core all in one action.
When disconnected, it traps refrigerant in the charging hose. Leave it permanently installed on the end of the hose.
The seals are compatible with newer refrigerants, and if internal parts need replacing, a parts kit is available.
Buy with 100% confidence knowing your purchase is backed by the full Manufacturer's Warranty.