May need to maintain physical strength and stamina; Use arms, hands, and legs fully; Push, pull, and frequently lift and carry objects weighing up to 50 pounds; and stoop, kneel, balance, crouch, crawl, and climb to perform job tasks. Responsible for laying out, fabricating, assembling, installing and maintaining piping and piping systems, fixtures and equipment for steam, hot water, heating, cooling, lubricating, sprinkling and industrial processing systems.