Master #B401

Very good product, works great

Hoses are regular Right Hand treaded. Comes with coupler to attach to R1234yf can tap. Not a big deal but the fun begins where you will tighten one side of the coupler, and then accidentally loosening the other. Get a wrench or pliers to hold the opposing side. 🙂.Nice feature that each hose has an integrated plastic nut turner that you can move to either side. Comes with a purge valve and the extra vac valve is nice.Overall it got the job done. Good value.

It's a decent set. A couple issues: 1) the low pressure r1234yf coupler doesn't fit. The quick connect fitting is about 0.5mm too short for the vehicle low pressure shrader valve stem. I had to file it down to make it work. 2) forget about the can tap in the kit. You need to buy one that actually works. I understand the vendor probably have a bunch of such kit already made and it's not practical to replace the can tap. Why don't you just lower the price by $10. 3) the kit comes with a couple pages that shows a connection illustration and a few words on how to vacuum, charge, etc. No explanation on how the 4 ports works. This is important because for people who have been using the 3 port system, this is different.

Good quality, well made. Everything you need to recharge your cars ac system. Hoses and fittings are standard 1/4 RH thread. Has adapters for left hand thread. r1234yf fitting.Good value for the price, would recommend.

I love that it has a separate hose to pull vacuum on the system. My old gauges only had a single hose so I had to swap from the vacuum pump to the r134a bottle which means you'll let a little air in. With these gauges you just close the vacuum hose and open the fill hose which you've already vacuumed so there should be essentially no air in the system at all. The r134a fittings are also quick connect so it's much easier to use.

a little weak, but for not a regular use works perfect - good for the price

I used this to evacuate and recharge the R1234yf ac system on my Honda, and it worked perfectly. The hoses were long enough to reach the service ports while hanging from the hood latch, the 1234 port connectors fit well and sealed without any issue, and it even included the right adapter fitting to connect to the vacuum pump I rented from the auto parts store. The only thing that wasn't included was the R1234 self sealing can tap, but that was only $8 on Amazon as well and worked just fine with this manifold set. If you know what you're doing, this set will work just fine for you. The included instruction sheet is more of just a "contents list", but if you need more thorough instructions, you should probably watch some videos before tackling AC charging, and maybe consider enlisting the help of someone more experienced in charging ac systems as well.

Wouldn’t fit the recharge bottle. Do not buy cheap POS.