If you purchase a “do-it-yourself” type air compressor, or if you purchase any type of air compressor for that matter, check to make sure that it comes with an Air Regulator. If not, purchase one. You will be glad you did!
It’s FRL on purpose, folks!
FRL is an acronym for Filter, Regultor and Lubricator, devices used to “condition” the compressed air from a compressor before it gets to your application be that through an air valve to air cylinders, powering air tools and so on.