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

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