Review on 🔧 Mastercool 82375 R134A Oil Injector: Essential Silver Accessory for Seamless AC Maintenance by Jhon Clark

This is a very high quality tool for professional use. Very easy to use. If you complain about the wrong equipment, you simply bought the wrong one. This is for R134a, Mastercool also offers for use with R12 systems. Hardware is different. You must inspect and clean the barrel before first use. This injector can be used prior to priming the system or with a fully charged system. I have the full line of Mastercool A/C Service Tools. They are of the highest quality and value. Don't throw away this wonderful tool because you're not a professional and you don't know how to use it.