These couplers are a great addition to R12 AC gauges to use on 134A! Closing the valve prevents depressing the schrader valve while connecting the couplers so no oily freon blasting all over the place. Opening the valve then depresses the schrader valve and connects the gauges to the system. Disconnecting the gauges with the valves closed prevents any leakage and seals the gauge hoses with no losses!
Verified purchase: Yes | Condition: New
These 1234yf refrigerant adaptors fit the AC Lines properly and are well constructed. Really like the turn to shut off feature.
Verified purchase: Yes | Condition: New
Haven't used it yet, but it appears to be good quality tool.
Verified purchase: Yes | Condition: New
Easy to use, great product
Verified purchase: Yes | Condition: New
Accurate fit and affordable
Verified purchase: Yes | Condition: New
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