OrionMotorTech OrionMotorTech 3 Way AC Diagnostic Manifold Gauge Set for Freon Charging, Fits R134A R12 R22 and R502 Refrigerants, with 3FT Hose, Acme Tank Adapters, Quick Couplers and Can Tap

Connected this to the AC service ports in my 2013 Kia Optima that uses R134a refrigerant to check the pressures, which has a notorious problem with its thermal expansion valve. This product performed very well and read accurate pressures that correspond with the hot air from the AC system. I also need to point out that I attempted to use this on a 2020 model vehicle with a good working AC for comparison purposes but did not realize it uses the more modern r1234yf AC system, thus my valve connectors did not fit. I still plan to have the system evacuated, then I will vacuum and refill the refrigerant after replacing the faulty expansion valve. I look forward to updating this review afterward.UPDATEThe recharge process went well and these gauges were excellent. Definitely a great purchase for the DIY person who needs something inexpensive for a few uses. No leaks at all.

Perfect

Not a good value would not buy again

The media could not be loaded.  Simple cheap and easy to use!

I used this with a cheap harbor freight venturi pump and my old compressor to purge the line and inject r-134a refrigegerant, restoring freezing air to my old Pilot.