OMT 3.5 CFM Single Stage Vacuum Pump for R134a R410a R22 Auto AC HVAC Kit

I read reviews for a hand full of these pumps before purchasing and was worried about a hand full of things. I have done plenty of automotive A/C jobs and got tired of dealing with rentals or an air compressor venturi attachment. I decided to treat myself and bought this to make life easier. It works great and bottoms out the manifold gauges within a minute or two to boil off any moisture. I kept it on for 45 minutes and was all worried about oil clouds and misting etc, but this did not make any mess at all, nor use any oil at all. Maybe it was the environment, I’m not sure. For reference this was in Southern California and 82 degrees outside. It’s true the provided bottle of oil that comes with this is only enough to fill the tank half way to its capacity, but since it didn’t consume any oil for the job I am still good for the next one. This pump is whisper quiet as well, so I was able to talk normal around it running with no issues and the neighbors can’t complain. The casing was hot to touch as expected, but not enough to burn at all. Build quality is exceptional, including the plastic port caps. I was worried those would be brittle and thin, but they are heavy duty. No leaks at all either, and will update if I have any issues. Overall, just a great purchase!

Works pretty good and is a good price.

This vacuum pump works very well and is easy to use. It pulls a strong vacuum quickly and performs exactly as expected for automotive A/C work. The build quality is solid, the motor runs smoothly, and it offers excellent value for the price. I have used it several times with no issues. I would definitely recommend it to anyone servicing air conditioning systems or other vacuum applications.

Quiet operation and serves the purpose. Seems to be of reasonably good quality for fairly my infrequent use. No complaints, especially for the price point.

Pretty nice little pump, although I doubt the 3.5 cfm rating is accurate. It seems a little weak and couldn't pull a very deep vacuum, but good enough for auto a/c work. I don't expect it to last long because it was cheap but so far it's been working well. I didn't have the issue that others had of the included oil leaking out of the bottle in the box.

It worked perfect. We also bought the compressor for the air conditioner from Amazon. My grandson changed it out on his car. He watched YouTube. It took him four hours and he is definitely not a mechanic. It was a big job. He’s 20 years old now he has air conditioning in his car. These products I bought from Amazon worked great no problem at all

What Vacuum Pump. It arrived leak free, seemed very sturdy upon inspection. I used it on my truck today (1990 Chevy Silverado 1500 5.7L V8) and the A/C had been converted to R134a back in 1998. It was real easy to use with my OMT AC Manifold Gauge Set that I bought separately as I wanted better gauges than the ones offered by OMT kits. This pump is a wonder. It pulled a -30 inHg in about 20 seconds flat. Then when I kept it on for over 30 minutes to pull out all the air and water it got Semi-Hot but you could still touch it for a couple seconds to check the temp. Never got real hot at all. Actually it states it will pull a 5Pa but it looks like it will do a low 4Pa as my gauge went past the -30 into the black. Oil supplied was sufficient for a good between High-Low fill and it never moved from that position the whole time. Smoked very little upon start-up. IMHO this is a excellent unit and priced right for a DIY person. Need it - Get it..

Quient and efficient. Motor got hot after 1hr of use but nothing wrong.

Muy buena bomba

Used this to pull a vacuum on my AC system before recharging. System held a solid vacuum. Vacuum hose connected to the pump with no effort and has a nice tight fit. It is affordable for someone like myself who’s somewhat of a DIYer and a home mechanic. It is a reliable entry level pump.

I'm a heat pump installation technician. This machine is of high quality and very easy to use.

Super genial

Va tres bien