Certified A/C Pro Car Air Conditioner Refrigerant Gauge & Hose,Reusable AC Recharge Kit to Dispense R-12343YF to Compatible Vehicles,Includes Recalibrateable Low & High Pressure Gauges,InterDynamics

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This review is for the "R-1234yf manifold gauge set", not the "R-1234yf Recharge gauge and hose" The gauge set seems to be decent quality, but it is useless, because they did not machine out the the passages between the charging port (yellow hose connection) and the low (blue hose) and high (red hose). After figuring out what I thought was the issue with the gauge set, I decided to go buy a different set to confirm it was the gauge and not something strange with my vacuum pump or car. And sure enough, I was able to pull vacuum and charge my AC system. Learn from my mistake and instead of buying this set, go buy a R-134a gauge set from Harbor Freight and buy R-1234yf to R-134a couplers off of Amazon so that you can use it with the R-1234yf system on your car.

The gauges look nice and work fine. I also ordered a piercing valve. When I got both in my hands I knew I was in for some learning pains. The yellow hose to connect to the refrigerant canister is 1/2" LH ACME thread. This may work with 10 pound tanks of refrigerant, but is a big problem when trying to connect to the self sealing can. For this you need a piercing valve, and the only ones I have found have an outlet that is 1/4" FLR (so it require a flare connection). These 2 things do not go together in any way that I could think of short of cutting the hose and using a barbed fitting (which works but you also need to flare tubing and make up some brass fittings). So, InterDynamics, I have a request. Just add an adapter in the box. It probably only costs $10 more and sure does make this learning curve less painful.

If you're a DIY'er or not EPA certified for cans over 8oz, I would recommend the following advice. I thought I had bought all the correct adapters, but here I am waiting on another 4 days to continue my project. Assuming you'll be adding refrigerant or vacuuming the system, I would recommend the following items: 1. The gauge set above 2. https://www.amazon.com/gp/product/B07SSS456C/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1 R1234yf can tap. This is LH on the part that screws into the can and RH on the output, as many have mentioned this is a problem. I didn't realize the service hose was left-handed on one side, and I tested it with the dual thread that goes to the actual manifold. 3. I have tested this can tap with the Honeywell cans you get at AutoZone. https://www.amazon.com/gp/product/B07SSS456C/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1 4. This vacuum pump: https://www.amazon.com/gp/product/B012CFTYX4/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1 5. This is the biggest part of this list: https://www.amazon.com/gp/product/B07K2TZWJQ/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 You must have the 1/4" RH to 1/2" LH adapter. Without it, you cannot pull a vacuum or add refrigerant.

I am not normally one to leave negative reviews, but I bought this tool to get a job done and a deadline, went to do the job, and it failed me 100%. The yellow hose, which would normally connect to a vacuum pump or a refrigerant can connector is reverse threaded for a large can of r1234yf with a valve on it. There is no adapter for a vacuum pump OR connecting to a small r1234yf can. These are a must for the vast majority of the people who would buy this. And for the Price of this, and the price of the nine dollar parts I had to order and wait two more days to do my job, you would think they can just add a little bit to the price of the kit and included. Very disappointed this screwed up a very important job for me