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

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.

Bought this vacuum pump to replace an old one that died on me. Had to vacuum mini split system after installing it worked very well. Very happy would recommend.

Worked perfectly

13June23: ADDED Pict and Video in response to a Question on Amazon. Top port is standard A/C manifold hose connection (1/4" flare). Lower port is 1/2" outside threads diameter, and its tip is 3/8" diameter with flat end. Both screw Caps have sealing o-rings inside. Worked fine as advertised. Very quite, smooth start/stop, and minimal heat buildup. Vacuum of 30pisg easily achieved on empty car A/C system. None or minimal How To Instructions. Included 8.5 fl oz (250ml) OMT brand Vacuum Pump Oil ISO 100 (30w) fills oil reservoir to Full. Instructions says only to use ISO 100 Vacuum oil. Minor issues: (1) the Vacuum Air Exhaust/Oil Fill cap (RED Plastic) contains inside it a small piece of coarse gauze as a particle filter. Since it is "exhaust only" its function is not understood. PERHAPS OMT expects user to fill oil through this gauze rather than simply unscrewing entire red plastic part? But OMT clearly states only fill with new, clean Vac Oil. Coarse Gauze would only remove coarse size particles. (2) Red Fill plug screws into top of pump body and has very loose fitting oil ring, which can be lost if user not careful.

This thing removes air very fast and well, draws down a car a/c very fast. The oil filler top is liable to spill if you lean the unit over, so keep it upright or you will make a mess. Buy a spare bottle of oil if you plan in using it a lot. You will need the entire bottle they give you to get it started. Excellent value for money and delivers. -- Update. I have now used this pump multiple times over a 2 year period. Works great no problems at all. Paid for itself the first time i used it, every time since is a big bonus. Draws down a small A/C system in 20 seconds, a large house type it takes a couple of minutes. Holds a vacuum well, if you forget to close the manifold right away. Top up with oil when you are going to take it out and use it, or if the oil become discolored with contamination. I also rigged up a system to use it instead of a foodsaver for vacuum sealing mason jars, vast improvement.

My old vacuum pump made from a refrigerator compressor finally crapped out, after 20 years or so. This is an excellent replacement for the money. It works much faster than my old scavengened fridge compressor. I've used it 3 or 4 times, it's done a good job. Perhaps not as efficient as a 2-stage, but it works just fine.

It seems every product has a few reviews that say things like "Junk", "Trash'', or "Don't buy" etc. I tend to disregard those if there are many many positive reviews. In my case, the former were correct. It comes with a bottle of oil which has to be added before use. On the first use, once I vacuumed down to about 280 microns, I either had user error or a leak because when I turned off the pump, my micron gauge went crazy so I thought I had a leak I tightened the connections and tried again--same result. By the third time, it was dark outside so I was working by the light of my phone flashlight. I couldn't even get a vacuum to register on my micron gauge and in the light of the flashlight, there was smoke coming out of the filter cap when the pump was running that i had not noticed in bright sunlight. I double checked the oil level and it was fine. Eventually I realized the the pump had failed and purchased another from Harbor Freight Tools that weighs about 50% more than the one from Amazon. It performed phenomenally and I was able to vacuum my system down to 170 microns with 2 sessions. I returned the failed pump to Amazon and saw that other users had had the same experience as I.

Herramienta muy buena de muy buena calidad los materiales

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.

Funciona bien y el empaque es muy bueno, incluye instructivo bien explicado y aceite en una botella que viene en la misma caja.

Worked very well for evacuating a mini split. No fuss, comes with some adapters, oil and gloves

Très bon produit. Recommande avec confiance.