Discover what it is like to be a Sprinkler Fitter Local 669 apprentice. This video shows you a typical day for a Sprinkler Fitter apprentice and what to expect if you want to join this in-demand field and help save lives by installing and maintaining these crucial lifesaving systems. Sprinkler Fitters Local 669 is a proud affiliate union of the Columbus/Central Ohio Building and Construction Trades Council.