Listening to the most recent HVAC know it all podcast made me curious about how everyone cleans their micron gauges. @Gary McCreadie mentioned the use of mineral spirits. I've always used 70% iso alcohol. Not sure if this is proper or not but it always worked well for me. It's important to keep these clean becuase they just don't work if you don't keep them clean. When doing installs I was usually pulling 5-10 system down a week I found I would often clean it once a week.

Posted by Dick. C at 2021-03-29 12:16:26 UTC