R410a Charging Vacuum Port Adapter Brass Converter with Thimble 5/16 Inch Female Quick Coupler to 1/4 Inch Male Flare for Mini Split System Air Conditioner HVAC (2 Angled Adapter)

I only needed an adapter to do a one-time recharge on my mini-split, and this is just fine for that (and there's an extra for next time, if there is one). Huge props to the person who showed how to remove the white piece and replace it with the green gasket. I was able to pull the white one out with needle-nose after unscrewing the pusher and didn't need a dental tool, but for each his own. It made a great seal. You'll lose a small amount of gas when detaching it, but it's very small. It was reading roughly 50 psi when I hooked it up, I recharged it up to around 110, then I detached it and lost a little gas. When I reattached it to add a little more, it was still reading close to 110, so it's not a huge loss.

I was going to just pick up one of these at my local LowDepot and of course they aren't in stock, and better yet they cost 2 or 3 times more than here on amazon, so its a no brainer if you hate wasting money, just go ahead and get two or three for the price of one locally and you will have a spare. Bottom line, works great, great price, came quick. Even if you dont need it for its intended purpose, its fun to just spin the brass thingy on the end.

Worked well and made my job much easier when self installing my mini split

Based on what others have said, and the design itself, I went ahead and modified it before using it, aannnnddd (drum roll please), IT WORKED GREAT.On one of the short ones, and one of the long ones, I replaced the Teflon (white) seal with the included softer seal. But, based on the way the male end was affixed to the tube, I still didn't trust it to seal: it is not soldered on -- appears to just be pushed into place. SO, again, before even using it, I went ahead and put some anerobic-curing post-assembly sealant* between the tube and the male fitting. I put it on the outside, and it wicked down into the joint. You can see in the attached photo where I put it. END RESULT: When I did use it to evacuate a system, the vacuum held for about 20 minutes with no indication of leakage (the vacuum gage didn't budge over the 20 minutes, nor when I turned the pump on again at the end of the 20 minutes.)I wish they had just provided the 8 seals as part of the kit, without installing the 4 Teflon ones. The seals are EXTREMELY difficult to remove. The only way I could get the Teflon seal out was to use an Exacto knife to cut completely through the seal (from bottom to top -- risking putting a scar/leakage path in the brass), then to pry one of the edges away from the brass enough to wriggle some needle-nose pliers between the brass and the Teflon. It was a major pain-in-the-hand (I ended up injuring my finger with a sharp instrument -- recommend holding it with pliers while wrestling with it)! Once I got the Teflon seal out, installing the soft seal was easy: just pushed it in with my (uninjured) fingers.*Permatex Threadlocker GREEN, Penetrating Grade 29000 or LocTite equivalent.

The price is great and the product is great. I don't plan to use it often so I can't speak about the long term reliability but I trusted this more than my gauges. Looks like it's built well. It came with what looks to be green gaskets and I'm not sure what they were for but it worked without them.

worked great for hooking manifold to minisplit lines for vacuuming before install.

This adapters leak so refrigerant would start to come out immediately. The oil in the leaked refrigerant would make it that much harder to tighten it to stop the leakage. It takes a lot of effort and over tightening to make it work. The gasket seems to be made of some hard plastic instead of rubber. Not sure what’s the reason for the choice of material. Would not recommend this product.

The adapters arrived very quickly and were packaged very well. These were used to recharge a split system that used R410A and worked perfectly.

I’m a HVAC technician and decided to try these out because of the price and the good reviews. Used them once and they are all leaking. DONT BUY! Better off spending the extra money on Yellowjacket adaptors they will last 1000x longer.