Optional · 1 of 3

Tickets that raise your rate

• Master plumber license

  Needed to pull permits and run your own shop in most states. Extra exam after several years as a journeyman.

• Welding certification

  Pipe welders on industrial and process work are paid a level above standard plumbing.

• Medical gas installation

  Oxygen and vacuum lines in hospitals. Separate certification, tightly inspected, and well paid.

• Backflow prevention tester

  Short course and a state certification. Steady annual testing work that is yours to keep.

• Gasfitting and HVAC (heating, ventilation and air conditioning) tickets

  Widen what you can legally touch on the same job.