Gasfitters – Class B install, inspect, repair and maintain gas lines and any gas-fired equipment up to and including 400,000 British Thermal Units (BTU). They also service, repair, remove and replace gas-fired equipment and components of gas-fired equipment. This Refresher course will help Gasfitters to prepare and write the Inter provincial (IP) / Certificate of Qualification (TQ) examination . Information pertaining to the eligibility requirements for writing the IP/TQ exam must be obtained from the Local Apprenticeship Board.