Summary Certifies, fabricates, assembles, installs, alters, maintains and dismantles all piping and plumbing, including hangers and supports, and pipe cutting, bending and welding activities necessary to the performance of the task. Duties and Responsibilities Certifies, fabricates, assembles, installs, alters, maintains and dismantles all piping and plumbing, including hangers and supports, and pipe cutting, bending and welding activities necessary to the performance of the task. Installs, maintains and repairs necessary piping on refrigeration, heating and air conditioning equipment. Installs and dismantles unit heaters and coolers, shell type heat exchangers, tanks and package boilers. Installs filters, seals and packing on air, refrigeration, heating and air conditioning equipment except compressors in the shop for rebuild. Certifies, installs, adjusts and maintains such items as gages, regulators, temperature control devices, recording instruments and flow meters pursuant to the task (excluding calibration). Installs insulation and covering on all piping and equipment as described above. May lubricate equipment when necessary in the performance of related tasks. Uses all tools and equipment pursuant to the task, including hand or power equipment to hoist and move personnel and materials except mobile cranes. May transport tools, materials, and equipment to and from job site which are to be used by employees in the Pipefitter job classification. Performs related tasks as necessary in the completion of the employee's primary work assignment in the Pipefitter job classification. May perform cleaning of roof cooling towers pursuant to the task. Works from prints, sketches, specifications, and written or oral instructions and does paperwork pursuant to the task.