Determine and obtain all supplies and equipment needed to make repairs; erect and use ladders, scaffolds and chainfalls; work above ceilings, on roof tops, in crawl spaces, pipe chases or manholes, behind walls, at any heights from below ground level to several stories high and at any angle with heavy pipes and tools; ensure water supply is shut off in work area as appropriate; remove piping and fixtures and size new to fit securely and without leakage; cut threads and pipe on location or in shop as conditions permit. Determine where pipes and water supply are located; check water or gas pressure and flow; adjust valves and regulators as necessary to control flow; utilize appropriate methods, procedures and equipment for worksite and substance to flow through pipes; work with and on cast iron, plastic, copper, glass, black steel and galvanized pipes and fixtures as dictated by current piping and/or system requirements; locate mislabeled or unidentified pipes.