(72 Hrs and 18 Months On-the-Job Training) This course meets the State of Idaho requirements for the Plumbing Appliance Specialty License and is offered through correspondence or may be arranged in a classroom setting for a group. In order to obtain this license, students must be registered with the State Plumbing Bureau, perform 18 months of on-the-job training and complete an approved 72-hour related training course.