What is a Licensed Plumber Called?
A plumber who holds a valid license and qualification gets divided into three levels, i.e., apprentice, journeyman, and master plumber, respectively. Although a Master Plumber and Journeyman are accredited as plumbers, only a Master Plumber can have a plumbing company managing other plumbers.
Also, Master Plumbers and Journeyman possess equivalent skills and expertise, and both can operate without surveillance.