Orion Motor Tech Vacuum Pump, 4.5 cfm 1/3 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

This little AC vacuum pump worked awesome. Very quiet compared to my old one. Vacuumed all the way down to 30 without any issues. I would recommend this product to any seasoned AC person as a great budget vacuum pump.

First use was to pull a vacuum on my cars a/c system after repairs so I could recharge it. The pump pulled to 30inHg in less than a minute and then ran straight and held it there for 30 minutes. No issues at all. Pump is very quiet and seems well built. I will be using this when I install 5 mini split a/c systems in my home this summer, but the pump already paid for itself when used on my car. This is a great pump at a great price and perfect for the DIY'er like me.

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Works well, not too loud and after initial pressurization very little oil mist comes out. Does run hot but I believe this is to be expected.

Great product. Put it through paces and it worked great

Its working

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. **

Easily pulls down to 30”Hg and fairly quiet. NOTE: The pump did not come with enough vacuum pump oil to bring the level up to the minimum line and I needed to purchase more.