plumbers

noun

1. 1.One who works in or with lead.
2. 2.One who furnishes, fits, and repairs pipes and other apparatus for the conveyance of water, gas, or drainage.
3. 3.A person who investigates or prevents leaks of information
4. 4.In the Royal Navy, an apprentice, a boy aged 16 to 18, who is trained in technical skills at the Dockyard Schools to become an artificer.
5. 5.A urologist.