Can you use PEX for venting?

Question

Is there such an option as using PEX for an 1-1/2 vent ? I have a stretch where I need some flexibility for my pipe which is going to be difficult to achieve with copper or ABS.
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isherwood · Accepted Answer

Pex is only legal for supply plumbing. It's not rigid enough for drain or vent use, as the lack of internal pressure could result in it being constricted.

Can you use PEX for venting?

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