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Plumbingaka: soil stackaka: soil line

Soil Pipe

In Plain English

The drain pipe specifically designed to carry toilet waste from a bathroom down to the building's main drain.

Definition

A drain pipe that carries fecal matter and urine from water closets and urinals to the building drain. Soil pipes are distinguished from waste pipes (which carry non-fecal liquid waste) and must meet minimum diameter requirements — typically 3 inches minimum for a water closet connection. Cast iron and PVC are the most common materials.

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