- a person who installs and repairs piping, fixtures, appliances, and appurtenances in connection with the water supply, drainage systems, etc., both in and out of buildings.
- an undercover operative or spy hired to detect or stop leaks of news or secret information, often using questionable or illegal methods, as illegal entry or wiretapping.
- a worker in lead or similar metals.
- a person who installs and repairs pipes, fixtures, etc, for water, drainage, and gas
