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A circle marking a pipe running vertically.
Also known as: Vertical pipe symbol, Stack symbol plumbing
The plumbing drawing symbol for a pipe running vertically through the floor being drawn.
Marks a pipe running vertically through the floor shown on a plumbing plan.
Contexts: Technical drawing
Is a section through a pipe rather than a view of one, which is how a flat plan records the one direction it cannot draw.
Contexts: Technical drawing
A small circle on the plan where a pipe passes through, sometimes with an arrow marking whether it rises or drops.