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Tickets that raise your rate

• Master plumber or master gas fitter

  The license you need to pull permits and run your own company. An extra exam after years at the journey level.

• Pipe welding certification

  Certified welders on gas and process piping earn more than almost anyone else in the trade.

• HVAC (heating, ventilation and air conditioning) certification

  Combining gas with furnace and boiler work makes you a one-truck solution for a homeowner.

• Medical gas certification

  Hospital oxygen and vacuum piping is a licensed specialty with very few qualified installers.

• Propane certification

  Rural and recreational propane systems follow their own rules and need their own training.