Inspecting, adjusting, cleaning, repairing, the following: plumbing fixtures and systems, steam operated equipment, heating and water systems, waste lines, kitchen and laundry equipment, air compressors, medical compressed air systems, vacuum systems, oxygen systems and natural gas distribution systems. Install, modify, and repair potable water, sanitary sewer, compressed air and high-pressure steam systems; and Ensure pressure tight joints, such as compression, flared, threaded, flange, bolted flange, welded and soldered.