Mechanicals · definition
The system carrying waste out and venting the drains so traps hold their seal. The hardest part to relocate in a remodel.
Source: InterNACHI — Understanding Your Home’s Waste and Vent System
Where this comes up
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.