QDEAR TIM: My city allows homeowners to install their own plumbing. To get the permit, I need to supply a rough-in plumbing diagram. What is a plumbing diagram? Can I just do a bathroom plumbing ...

The diagram will absolutely have to include a bathroom plumbing vent diagram. Vent pipes on plumbing diagrams are drawn as dashed lines, while pipes that carry water are drawn as solid lines.

The diagram communicates to the plumbing department that you know the correct pipe sizes for all the drains and vents. The drawings also show how to connect all the pipes together.

From rough-in plumbing to moisture control, here’s what you need to know before you build. ... Basement Bathroom Build: Permits, Plumbing & Prep. Posted: April 25, 2025 | Last updated: April 25 ...

Monday on The Current, our project 'By Design' looks at the bathroom, a room many say is poorly designed and long overdue for major renovations. Content Skip to Main Content Accessibility Help ...