Used these gauges to recharge my HVAC unit with R-22 Freon refrigerant. Everything was in kit and no issues encountered. The needle for the low side blue gauge was just a tiny bit off from idle atmospheric reading not at 0 but not a big deal as you can adjust by taking the clear face cover off and gently turning the flathead adjuster. I didn’t try and just made note of it. Nice for a DIY and not as a professional.

Back many moons ago I did residential A/C and used Yellow Jacket gauges. I gave them to my son for his work and have not needed gauges until now, to work on my old car's a/c. This set of manifold gauges are just as good for a lot less money. Granted, I will use them only occasionally, not everyday. I have always hated short hoses, and this set comes with 5 foot hoses, just what I like. There is no problem with leakage, they seal fine. The high side adapter is difficult to remove unless I shut off car and wait for the pressures to equalize, which means I am fighting less pressure on the high side. My high side port is not easy to get hold of because of its location and by waiting for the pressure to decrease I can push down on the fitting enough to lift the collar. That is an adapter thing, not the gauges, which work great. Yes I would recommend these gauges to a friend.

I had a manifold gauge set sold by NAPA that lasted me about ten years; after a while, the fittings got worn out, the hoses became nicked in spots, and I dropped it which bent one of the gauge faces.... I decided to buy this cheap set instead of repairing my name brand one because apparently I am pretty hard on these. I used it to vacuum and fill a system the other day. The hoses and manifold feel like they are decent quality. The gauge housings are plastic, but the gauges are easy to read and seem to be more or less accurate. As others have noted, the temperature notations are in Celsius, but I don't use those anyway. (I go by the rule that on a car, low side should be 30-35psi and high side should be twice the outside temperature plus 50 PSI). Little caveats: 1. the fittings on the back of the manifold that are supposed to be for storage of the lines are not practical, because they are threaded fittings, not 134a ports. So you'd lose the actual end pieces because you would have to unscrew them in order to use the "storage ports." No big deal, I just don't use them, I wrap it all up and stick it in a cabinet anyway. 2. I did find the high side port to be a little finicky, nowhere near the disaster that other reviews describe, but I did have a little bit of trouble with it. I wear gloves when working with refrigerant, because common sense, but did experience the effect of the high side pressure venting out of the manifold and hose after some considerable effort to disconnect it from the car. I will monitor this and update the review as appropriate. At this point, I would recommend these for a DIYer or light user, with the low price in consideration.

My evaporator core sprung a leak and after getting a couple of quotes, I decided a DIY fix was in order. This manifold gauge set wasn't my first choice, the other was sold out, but in hindsight this set has 1 ft longer hoses which made the AC work much easier. I had no trouble putting it together or hooking it up, the high side slid right on without any struggle. Seals were all good and I was able to successfully vacuum test my work for 12 hours without any leakage in the system or the gauges/hoses. Recharging the system was a breeze with the can tap adapter (not included!) and I felt much better doing the recharge with the gauges versus the prior work I've done with a single low side can tap and gauge. The high side connector did indeed stick after running the system for 30 minutes while I recharged the system and the root cause is very clearly thermal expansion. If I hook up the system when the system and car are cool, it pops right off without issue. Once the car and the system heat up, the connector and hoses heat up and then it becomes more difficult. In my case, I waited 5 minutes and the quick connect released without much fuss. I'm sure there is an engineering solution to this problem, but for the price I'm ok with waiting a few minutes. It gave me an excuse to have a beer and celebrate a successful AC repair!

Helps when you need to diag or do a simple recharge. Easy to use, easy to set up, easy to look at.

Moisture causes an AC system to leak. You pull a vacuum on the system to remove any moisture possibly in the unit. Then, the correct way to add Freon is to connect your refrigerant to use your yellow hose and through a port connected to your gauges, evacuate any air remaining in the hose until coolant starts to spray out assuring there's no moisture in the line. These gauges do not contain that valve making them unusable for refilling coolant in the state they're boxed up in. I had to go buy a $10 adapted to put between the two schrader valves at the top on the yellow to insure i did the job correctly. These will work great for diagnosing and pulling a vacuum, just not actually adding the coolant... which is the whole point. If you're looking for a complete set of usable upon opening gauges, these are not the ones. Also, the in depth guide they mention in the description only tells you there are 3 hoses to screw on the gauges, and then proceeds to explain how to check your ac system. There is not an explanation on what each adapter is and used for, there's not detailed parts list, there is not a company phone number, or even a company name. The front of the box says "brass manifold gauges' and leaves it at that. These are very cheap gauges that are only good for diagnostic purposes.

Fantastic

Works well but would prefer manifold with knobs for the LP and HP plug

Wasn't sure what to expect as I don't normally buy low-cost tools. This one should be used so rarely that I didn't want to spend too much. I did not use the provided quick-couplings as I had already purchased a set of high/low quick couplings that have valve knobs on them. The unit worked perfectly the first time and have used it a number of times since. The valves hold pressure for weeks (I just disconnected it from my nitrogen bottle for storage and it had residual pressure from a month ago) and gauges are accurate enough for my needs. Hoses provided seem to be of decent quality. If you do A/C for a living... spend more on your tools! If you need one of these occasionally... this will do just fine!

Worked for 4 months (refrigerant lines) and the gauge -1 year until the treads on the gauge gave up and refrigerant was purging out of the red handle. Works but you'd be better with a Yellow Jacket gauge if you're gonna use the gauge alot for a long period of time.

Hola, el manofold es genial, aun no lo he usado pero, fué una excelente elección, precio-calidad, excelente producto,lo recomiendo