OMT 3.5 CFM Single Stage Vacuum Pump for R134a R410a R22 Auto AC HVAC Kit | Copper Motor; 37.5 Microns Ultimate Vacuum; Aluminum Alloy Casing; For Automotive HVAC and Resin Degassing; Oil Included

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 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!

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

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.