Orion Motor Tech Vacuum Pump, 3.5 cfm 1/4 hp HVAC Single Stage Vacuum Pump for R12 R22 R134a R410a R502, Auto AC Vacuum Pump Kit for Automotive Air Conditioner Resin Degassing & More, Oil Included

I purchased this vacuum pump specifically for evacuating my vehicle's AC system before recharging it, and I'm pleased to report it performed exactly as needed. For anyone doing their own AC work or HVAC repairs, this pump delivers solid performance at a price point that makes it an attractive alternative to more expensive professional-grade options. Performance on AC Systems The pump pulled down my AC system efficiently and reached the necessary vacuum level without any issues. It handled the job smoothly, maintaining consistent suction throughout the evacuation process. The gauge readings were stable, and the pump achieved the proper vacuum depth required for removing moisture and air from the system before introducing new refrigerant. This is exactly what you need from a vacuum pump—reliable performance that gets the job done correctly the first time. Exceptional Value What really stands out about this pump is the value proposition. AC vacuum pumps can get quite expensive, especially if you're only an occasional user rather than a professional technician. This pump provides the functionality you need without the premium price tag of top-tier brands. For DIY mechanics or homeowners who occasionally need to service AC systems, the cost-to-performance ratio is excellent. It's affordable enough that you don't feel like you're making a huge investment for a tool you might only use a few times a year. Build Quality and Longevity Based on my initial experience and inspection of the pump, it appears to be well-constructed with durability in mind. The housing feels solid, the components seem robust, and there's nothing about the build quality that raises red flags about premature failure. While only time will tell for certain, all indications suggest this pump should provide reliable service for many years. It doesn't have that cheap, disposable feel you sometimes get with budget tools—this seems like equipment that's built to last through multiple jobs. Would I Buy It Again? Absolutely. If I were in the market for another vacuum pump or needed to recommend one to someone else, this would be an easy choice. That said, based on how well it's holding up and how solidly it's built, I don't anticipate needing a replacement anytime soon. This appears to be one of those purchases where you buy it once and it serves you reliably for the long haul. Final Recommendation For anyone needing a vacuum pump for AC work, HVAC repairs, or similar applications, this pump hits the sweet spot of performance, quality, and affordability. It does what it's supposed to do, it's built to last, and it won't break the bank. Whether you're a DIY enthusiast tackling your own AC repairs or a professional looking for a cost-effective backup pump, this is a solid choice that delivers excellent value.

Really great vacuum pump for diy. Got the job done. Great product.

Second Orion product I’ve bought and both have been quality tools. The pump came with oil, I filled it and put it to use. It works perfectly and I like the fact that it has both common size fittings on the pump. It also was a great value!

Seems ok, It worked for one use so I can't attest to longevity. They only send you a tiny little bottle of the special oil required. Somehow some of the oil leaked out and there wasn't even a tiny bit of oil left in that little bottle too even top it off.

Worked great for vacuuming my ac system on my truck after repairs

Has been great for epoxy debubbling, holds a strong vacuum and is small in size, operates fairly quiet.

I used it to vacuum the AC system in a Kubota tractor when I replaced a bad compressor. Worked great it had no issues vacuuming the system for an hour strait in 100 degree weather. I had my work fan blowing on it and it got pretty hot to the touch, but that did not seem to bother it. My cheap basic Vector brand manifold set fit it just fine. Seems like a good pump and it has already paid for itself with just the one repair and now I will have it for the next time an AC goes out on something.

I purchased the **Orion Motor Tech 3.5 CFM 1/4 HP Single Stage Vacuum Pump** expecting a reliable tool for my HVAC and auto AC needs, but this thing is an absolute **disaster**. From the moment I unboxed it, I could tell the build quality was subpar. ### **Major Issues: ** 1. **Cheap Materials & Poor Build** – The housing feels like flimsy aluminum, and the components seem poorly assembled. Within minutes of running, the unit started vibrating excessively and making a loud rattling noise. The handle even felt loose. 2. **Oil Leaks Everywhere** – After filling the pump with the included oil, I noticed **a major leak** around the sight glass and base. The seals seem non-existent, causing oil to drip constantly. I had to wipe the mess repeatedly, and after only a few uses, the oil was already contaminated. 3. **Extremely Weak Suction** – This pump claims to be 3.5 CFM, but in reality, **it barely pulls a vacuum**. I tested it on an AC system, and after 30 minutes, it failed to reach the proper vacuum level. Compared to other pumps I’ve used, this one **underperforms drastically**. 4. **Overheats Quickly** – After just 10 minutes of operation, the unit became **too hot to touch**. The cooling system is clearly inadequate, and I’m worried about long-term durability. 5. **Unreliable & Short Lifespan** – After a **few uses, it completely stopped working**. The motor struggled to turn on, and eventually, it wouldn't start at all. Contacting support was a nightmare—**they ignored my emails** and offered no real solution. ### **Final Verdict: ** This is a **waste of money** and a **frustrating experience**. If you need a vacuum pump for serious work, **DO NOT buy this one**. Spend a little more on a trusted brand —you’ll save yourself time, frustration, and money in the long run. ⭐ **Rating: 1/5 – Absolute Garbage. **

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I bought this vacuum pump mainly to replace my car’s A/C compressor, and it worked perfectly. It pulled a strong, steady vacuum and held pressure without any leaks. The setup was straightforward, and the pump feels solid and well-built for the price. It made the whole A/C recharge process smooth and professional. Highly recommend for DIY automotive work or anyone servicing their own A/C system.

Used it to vacuum prep my vehicles AC before adding refrigerant. Was pulling at least -30 PSI, but my gauges max out for any lower. Ran it for 45 minutes. Electric motor body was warm to touch. The pump part was hot, but not enough to burn. Easy to setup and use.

Burns oil but that seems to be normal

Great product. Works exactly as advertised.