Core terms · definition
A licensed tradesperson who installs and repairs water supply, drain-waste-vent, and gas piping to code. Relocating fixtures or running new lines is licensed, inspected work.
Source: U.S. BLS — Plumbers, Pipefitters & Steamfitters
Where this term lands on a Columbus budget
The cost pages carry the current local ranges, and the guides explain what moves them. A published range becomes a project number only after someone looks at the site.