The 18341 R134A Automatic Service Coupler Set features a unique automatic design which open automatically upon connection to the service port, you no longer are required to screw open or closed the valve actuator on the coupler to access the system. Simply snap the coupler on and start servicing. Couplers automatically close upon removal preventing flow from the hose when disconnected from the service port. Constructed of brass and aluminum, these will last.

Field service couplers connect to our special Enviro-Guard hoses to allow access to service ports on automotive R-134a A/C systems. The quick-connect design has an integral safety sleeve, which protects against injury and refrigerant loss if the coupler is disconnected under pressure. The compact design easily fits into tight quarters, which is especially handy for retrofits. Six-ball couplers provide a more stable grip on the fitting than do couplers with four balls.