Car Service Adapter Quick Coupling Set lockable

Automotive air-conditioning systems equipped with R134A refrigerant have standardised special fittings to avoid confusion with other refrigerants. Furthermore, different diameters are used for the high and the low pressure side to avoid confusion: 13 mm outer diameter = low pressure side (blue)16 mm outer diameter = high pressure side (red)The quick couplings offered here are lockable, e. g. for service purposes. The valve is only opened in the service port when the spindle is turned in and releases the cooling circuit. During decoupling, the cooling circuit is automatically closed. Adapter back for assembling aid in the size 1/4" SAE. as an alternative to this product we recommend the latest generation of quick couplers with locked design: quick coupling set for R134a motor vehicle air conditioning HD + ND lockable, connection M14x1.5.