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.

We’ll walk you through the bathroom plumbing diagram below and how to install a basic 5×8-foot bathroom—just enough room for the three major fixtures with adequate space between them.

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 ...

Plumbing departments all across the USA require riser diagrams. The diagram communicates to the plumbing department that you know the correct pipe sizes for all the drains and vents.