A lateral drainage branch on an upper floor receives two lavatory fixture drains, a bathtub fixture drain and a water-closet fixture drain, then conveys their discharge to a soil stack. Under the 2021 IPC definitions, what is this pipe?

Plumber exam practice question · Sanitary Drainage

A lateral drainage branch on an upper floor receives two lavatory fixture drains, a bathtub fixture drain and a water-closet fixture drain, then conveys their discharge to a soil stack. Under the 2021 IPC definitions, what is this pipe?

A horizontal branch drain
BA fixture drain
CThe building drain
DA stack offset

Where to look it up

https://www.ncosfm.gov/b-1-2024-ncpc/open

Why A is correct

The definition covers a lateral branch receiving two or more fixture drains or branches and conveying their discharge to a soil or waste stack or the building drain. It can include vertical sections or branches; “horizontal” does not mean perfectly level. The original explanation incorrectly said one or more. See PDF p.19, Horizontal Branch Drain and Horizontal Pipe. Source: 2021 IPC base text reproduced in the NC OSFM comparison document, https://www.ncosfm.gov/b-1-2024-ncpc/open

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A lateral drainage branch on an upper floor receives two lavatory fixture drains, a bathtub fixture drain and a water-closet fixture drain, then conveys their discharge to a soil stack. Under the 2021 IPC definitions, what is this pipe?

A lateral drainage branch on an upper floor receives two lavatory fixture drains, a bathtub fixture drain and a water-closet fixture drain, then conveys their discharge to a soil stack. Under the 2021 IPC definitions, what is this pipe?

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