a blue quick-release coupler is installed on the valve from the air conditioning system in the car to fill the r134a refrigerant.

134a air auto automobile blue car charging compressed compressor condition conditioner conditioning connection cool coolant cooling coupler device engine equipment fill filling garage gas hose installed liquefied liquid machine maintenance motor pipe plug pressure pump quick quickrelease r134a recharge refill refilling refrigerant refrigeration repair rubber service station system tube valve workshop