Mudder 7 Pieces Air Conditioning Refrigerant Angled Compact Ball Valve 1/4 Inch for R410A R134A R12 R22 HVAC and R410A Adapter 5/16 Inch Female to 1/4 Inch Male Flare for Mini Split System

Looks good but have concern about quality, still I didn't use them. As soon as I use them, I will write a review.

Hola a todos llegó en la fecha esperada y es de buena calidad lo que esperaba. Gracias

As others have said, these are not the highest-quality products. But then the are being offered at bargain-basement price and work fine if you know what you're doing. Leaky connections are easily solved by adding a tiny amount of Nylog to the fitting. The shrader valve depression issue is easily solved by unscrewing the shrader depression element just a bit with a shrader valve tool. The ball valve handles have considerable play up and down at the handle tip because the handles do not screw down flush with the valve body. As one can imagine, that play will result in the nylon ball moving into and out of proper position inside the body housing, which will likely cause a leak. I fixed that problem by unscrewing the handle and shimming the space with a small fiber washer or other shim. Look at is this way... If you can afford to pay $50 for a single industrial-quality ball valve (e.g., Yellowjacket or the like), go ahead. If not, you can make these mediocre-quality fittings work just fine if you know what you're doing. We are VERY LUCKY to have the choice...

You cannot beat this set connect to area and anything.

Started leaking out the handle after being connected about 10 minutes. It was a big enough leak I had to go grab some leather gloves, otherwise I would have gotten cold burned fingers. After I got it off, I could see the little O-ring on the ball valve had tried to squirt out through the lever. Maybe the handle wasn't tightened down, or maybe the O-ring wasn't seated properly, not sure. But it was poor quality and not useable.

Two of the main three valves started leaking within the first few days of use. One was fixable and the other was not.Gaskets were easy to change though.

Was going to buy the Appion. I like to invest in good tools but could not really justify it this time. These worked perfectly. Used Nylog and removed the valve stem from the mini-split prior to vacuuming. This kit came with about 12 extra valve cores, which I may not use. I removed the valve stems from these valves to pull a better vacuum.

I was able to pull a vacuum down to 100 microns and they did not leak.