Plans, lays out and schedules work; Instructs inmates in methods and techniques of measuring, cutting, threading and installing pipes, valves, gauges, and other fixtures involving the use of hand tools, pipe cutters, and pipe threading and bending machines; Determines defects and maintains piping system for steam, gas, water, air and pressure; Trains inmates in reading blueprints and schematic drawings to determine work aids required and sequence of installations; Performs preventative maintenance; Utilizes troubleshooting techniques to address problems with plumbing and steamfitting systems; Repairs fire protection systems; Performs air quality testing; Acts as liaison with outside vendors, contractors and agency staff; Works on specialized equipment relating to trade area; Performs work on high-pressure steam equipment; Tests and monitors pumps, boilers and heating systems; Keeps records and makes necessary reports; Maintains custody and discipline and evaluates the performance of each inmate assigned to work area; May perform supplemental duties related to other trade disciplines based on experience, knowledge, skills and agency needs; May purchase equipment; May physically restrain inmates, quell disturbances and otherwise assist security forces in emergencies; May be required to operate a motor vehicle; Performs related duties as required. Repair of critical systems such as: Drinking (potable) piping distribution/pumping; Hot water heating; Steam distribution piping; Drain (sanitary) piping, macerator (grinding, and pumping; Cross connection (back flow prevention); Cell fixtures (toilets, sinks and showers); Supervising assigned inmates at a Correctional Institution; Keeping record of tool/inventory control; Protecting the health and safety of the public, staff and inmates; Snow and ice removal to maintain safe access for the police, medical, staff and public; and.