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❄️ Stay cool, stay precise — the pro’s choice for AC diagnostics!
The Orion Motor Tech 4 Way AC Gauge Set is a professional-grade automotive HVAC tool kit featuring a robust 4-valve manifold, hybrid anti-shock gauges with 1.6% accuracy, and 4 color-coded 5ft hoses rated for up to 800 psi. Crafted from solid brass and durable materials, it supports R410a, R22, and R134a refrigerants, making it ideal for both DIY enthusiasts and HVAC professionals seeking reliable, precise, and versatile AC system maintenance.



























| ASIN | B078GJQGYQ |
| Best Sellers Rank | #4,912 in Automotive ( See Top 100 in Automotive ) #33 in Air Conditioning Line Repair Tools |
| Brand | Orion Motor Tech |
| Brand Name | Orion Motor Tech |
| Customer Reviews | 4.3 out of 5 stars 4,374 Reviews |
| Included Components | 1 x 4 Way Gauge, 4 x Hoses,2 x Quick Couplers,3 x Adapters,1 x Can Tap |
| Item Dimensions | 12.6 x 11.81 x 3.74 inches |
| Item Weight | 7.85 Pounds |
| Item dimensions L x W x H | 12.6 x 11.81 x 3.74 inches |
| Manufacturer | Orion Motor Tech |
| Material | Brass, Aluminum, PVC , Durable Plastic |
| Material Type | Brass, Aluminum, PVC, Durable Plastic |
| Model | 5864299654 |
| Number of Items | 1 |
| Part Number | OMTDMG171 |
| Thread Style | Npt |
| Thread Type | Npt |
| Unit Count | 1.0 Count |
| Warranty Description | 1 year |
P**O
Quality gauge set that won't break the bank
This Orion Motor Tech 4-way gauge set has been a workhorse for my HVAC work. The gauges are accurate and easy to read, with clear color coding that makes quick diagnostics simple. The manifold feels solid and well-machined—no cheap plastic parts here. The hoses are good quality with secure fittings that don't leak. I've used this set on R410a, R22, and R134a systems without any issues. The four-way design gives you plenty of flexibility for charging, recovery, and vacuum operations. What impressed me most is the accuracy compared to my more expensive professional gauges—they're right on the money. The case keeps everything organized and protected, which is great for mobile work or just keeping the shop tidy. For DIYers or pros on a budget, this set delivers professional-level performance without the premium price tag. I've put it through dozens of jobs now and it's held up perfectly. No regrets on this purchase whatsoever. If you need a reliable gauge set that actually works, this is it. Highly recommend!
A**R
Excellent
Sheeesh I went through 2 other brands stating that they worked with R410A. They did not depress the Schrader valve. Sent them back This kit works great and actually has the right depth to push in and open the valve for R410A as advertised. Nice quality. My AC is topped off and running perfect.
M**O
Great Guage kit, with poor can tap
Overall, really like the guage kit, keep in mind its budget price. Everything works, and all is good, but if your kit has the older clamp type of can tap, toss it, and get screw-on type for automotive 134A cans, IF you need it for automotive work. I used this kit to self install an R410A based mini split. You'll also need some other tools to do that job, depending on what you buy, such as a vacuum pump, micron meter, flare tool, etc. Also used it recharge another home AC system, after it developed a leak. You'll need similar tools, and refrigerant, which maybe you can still find on the E Bay platform. Also recharged a couple of cars with R134a, and the kit helps to make sure you dont overpressure the High and Low side lines. Would have given it 5 starts, and maybe it deserves it, but the included can tap is garbage. Looks like the new kits now have the better Can adapters, and if so, its definitely worth the money for a homeowner, DIYer. By the way, you can find lots of instructional videos on Youtube to help you figure out how to use it.
M**Y
Solid quality for diy needs
The gauge block is very hefty and I was surprised by its weight. If it drops it will surely ding the fender easily. The fittings are of decent quality along with the heavy hoses. Valve knobs all are metal open close smoothly. The only thing I did not like there was no resistance when turning at all and made me think sealing at the stem would leak but all seemed ok. The hose end valves were heavy metal having resistance of a tight seal on the stems. The hoses were flexible but solid, I could not squeeze the hose to flatten at all. The plastic case holds everything while it’s not assembled but it will not accommodate a fully assembled with hoses device where you have to disassemble to store in the case. Even if you remove the foam cutouts you still can’t store it assembled, not big deal to hang it assembled but it can collect dust but don’t count on storing it assembled in the case. Tested it and all seemed to work.
J**E
True and unbiased review,
I bought this manifold set to replace the old robyn air that got broken during a move. I’m pretty happy with how this manifold works. I have noticed that the fittings do come loose on the manifold and the quick connectors, but I will have to give them the benefit of the doubt for being new. I had no problem with the quick connectors sealing it all went together very quick and easy and the quick connectors fit the line fittings like a champ no leaking from anywhere. Yes the case could be a little bit better where the hoses go but it’s not a problem or a deal breaker for me. I like the aluminum knobs on it, it looks and feels pretty sturdy and well made. Have used it to evacuate and recharge a few R134A automotive AC systems now it will hold a 30ilb vacuum at the manifold with the quick connectors closed and 28-29ilb on the vehicle with the quick connectors open and the system drown down. I evacuated the systems for 45mins each and let them sit for 1hr on a closed system to check for leaks then recharged the system and all was good and done! Yes I would have to recommend this manifold set to anyone interested in getting a reasonably priced manifold set, It’s worth the money. Hope that this review helps you
A**2
Disappointed after reading reviews
I honestly have mixed feelings on this manifold set coming from a high end Testo digital manifold. I have been looking for a quality manifold that would be used as a spare set while traveling. The reviews led me to believe this was a great manifold that wouldn't break the bank. Unfortunately, I will have to continue my search after putting these through some tests. My biggest gripe is that the manifold has an identity crisis. The listing shows both auto and residential HVAC applications with regard to the manifold but I think this is a case where being something for everything results in being mediocre at best. In my particular case, I needed to add refrigerant to a heat pump using the low side (blue) pressure port. This manifold has the black labeled vacuum valve tied to the low side pressure port so you have to use that valve for charging. This also means you don't get to use the sight glass. The yellow refrigerant valve is tied to the high side (red) port and you cannot isolate the refrigerant and vacuum ports so you literally have to use the vacuum port for charging with the aforementioned lack of sight glass. The other observation was significant restriction in the manifold. During the charging process, I noted the manifold developing significant frost on the entire left side covering the low pressure and vacuum valves and knobs. The valves were fully opened and I was using a special device that mounts to the refrigerant tank to safely charge via liquid without slugging the compressor. My other gauge set does not experience this issue so I can only assume that the valve ports are smaller than normal and/or this manifold isn't a good match for my use-case of a TXV residential heat pump being charged using the subcooling method. Lastly, the hoses looked very similar to a set of yellow jacket high pressure R410A hoses that I have. The pressure ratings were high visible on the hoses and I liked the little wing nuts that could be used to tighten the hoses. That being said, I was disappointed that these were not low loss fittings. I really struggled with getting the nuts off of the high pressure side resulting in more refrigerant escaping than normal. Not good. The charging hose also struggled with refrigerant coming out of the cannister and presumably became brittle enough that the neck allowed refrigerant to occasionally seep out if the right angle was not maintained. Also not good. I will say that machining and heavy duty metal used in constructing it is great and provided a heft that felt like a really good manifold. The gauges have anti-vibration technology that worked and kept what appeared to be consistent measurements during the charging process. I am presuming they were also accurate but as we know there is a big difference between precision and accuracy in the scientific method. I also liked the case a lot. It is better than my primary manifold which is just a big empty plastic box that results in everything rattling around. Overall, I had a hard time with this review in that I had to evaluate my expectations for manifold performance vs budget vs advertised features vs the significant number of positive reviews that led me to my purchase. Unfortunately with the real-world issues that I experienced while using the manifold, I'm not able to recommend it as highly as others. I think it is a solid 2.5 rounding up to 3 stars with too many compromises for me to want to keep it for my use-cases at the current price point. Thanks for reading my review and letting me express my opinion on this item.
T**Y
Great set
Works great
M**K
Mehh. Sus reviews. This isn't it
Worked ok for pumping lines down but I question how long the seals will last. Rubber bits coming off the seals after first use... The can adapter for adding refrigerant simply does not work propely, when screwed down all the way to the refrigerant can. The only way to get the refrigerant out of the can is to let it leak out of the connection. Basically you have to start unscrewing the refrigerant can from the adapter while the pin is depressed into the refrigerant can. If you're good you can get the perfect point where the refrigerant doesn't leak into the atmosphere and still comes out but it's a VERY narrow window. Tilting the refrigerant can from this point can cause a leak. Oddly, the pin doesn't have the be extended that far for this to work, which indicates that it's not sealing the pin to the can. I also tried two cans of r134a, same result. But if you screw the can all the way down, then depress the pin, NO refrigerant escapes the can. I mean NONE! Even after fully depressing the pin into the can, fully retracting the pin, then unscrewing the can, absolutely no pressure relief at all...make no sense at all. The little stand alone blue recharge hose works infinitely better but you can't vacuum the air from it... Of course it's too late for me to return it by the time I figured it out. Mostly used for diagnosis and pumping which it works ok for, gauge needle doesn't go all the way to -30in of mercury. I know on other gauges my vacuum will suck vacuum lines to -30in in well under 5 minutes. 45min later and this gauge reads just above -30. Based on the reviews and price I thought this was it but sadly, this is not it.
R**5
Great for older John beam machines.
Great quality. Does the job. Different in the respect of using older machine where one has to disconnect yellow line on machine between vacuuming and filling. Great for older machines, Not automatic machines. Saves time, has, the environment 😂. Only down side is the plugs missing to hold taps. So used old set male plugs and fixed to machine.
M**L
Great analog gauge and hose set.
Great analog gauge and hose set.
C**A
Excelente para iniciar
La calidad del producto y los accesorios también
E**A
Exelente producto
Muy buen producto de muy buena calidad los materiales
E**E
Funciona bien
Trae todo lo necesario
Trustpilot
2 weeks ago
2 days ago