Gas Fitters install, alter or repair gas pipe systems that conduct gases of various types. They install gas piping, appliances, fixtures, devices and appurtenances. On a job, gas fitters inspect the installation site, cut and bend pipes to exact specifications, and join the pipes in accordance with prescribed methods. They must select the type and size of pipe and related materials according to job specifications. They must also be proficient in testing procedures in order to locate and repair leaks. A Gas Fitter Supervisor is trained and skilled in the planning, supervision and practical installation of gas piping, appliances, fixtures, devices and appurtenances in connection with gas. A Gas Fitter Trainee works with a licensed Gas Fitter to achieve experience and knowledge so they may advance to a Gas Fitter status. Requirements: 1) A Gas Fitter Trainee must have secured a training agreement from an employer and supervising Gas Fitter for a two-year training period. 2) A Gas Fitter must have served two years as a Registered Gas Fitter Trainee and have successfully passed the required examination. 3) A Gas Fitter Supervisor must have a minimum of one full year as a licensed Gas Fitter and have successfully passed the examination prescribed. Written and practical examinations: Gas Fitter Trainee: No examinations, License fee: $25.00 per year. Gas Fitter: Written and practical examinations: $75.00, License fee: $75.00. Gas Fitter Supervisor: Written examination: $125.00, License fee: $200.00 per year.