What is a TSSA gas technician license?
A TSSA gas technician license is the mandatory certification issued by Ontario's Technical Standards and Safety Authority that authorizes an individual to perform gas fitting work on appliances, piping, and heating systems.
The Technical Standards and Safety Authority (TSSA) issues gas technician licenses to qualified workers in Ontario who install, maintain, and repair gas appliances and systems. These licenses come in two classes: G1 (unrestricted gas technician) and G2 (appliance technician), each with different scope limitations on what work can be performed.
A G1 license allows work on all classes of gas piping and appliances, from residential to commercial. A G2 license restricts the holder to specific appliance types and smaller systems, typically in residential settings. Both require documented training, workplace experience, and passing a TSSA examination that covers safety codes, regulations, and technical competency.
Plumbers often pursue gas technician licensing to expand their service offerings beyond water systems into heating, water heater installation, and gas line work. The license demonstrates to customers and insurance providers that the technician operates under TSSA oversight and follows Ontario's Safety and Consumer Protection Act standards.
When hiring for gas-related work, homeowners and businesses should verify that the technician holds a current TSSA license. You can find licensed gas fitting providers who carry this certification to ensure compliance with provincial safety requirements.