A professional who assists gas-regulator repairer in repair and installation of regulators, relief valves, and related equipment. Responsibilities include:

• Dismantles and cleans regulators preparatory to repair.
• Performs regulator pressure-tests as directed.
• Cuts, threads, and joins pipe sections and fittings to fabricate pipe assemblies to be installed in regulating stations by other workers.
• Drives truck to haul tools and equipment to regulator station.
• Performs other duties as described under helper master title.