Is a fixture connecting right to the ground stack (vented) needs to be vented separately?

by mim   Last Updated September 12, 2019 00:21 AM

So I'm adding a shower in the basement ( there was a half-bathroom already ) and the new drain is literally right by the stack ( probably few feet away, like 3-4' max ) so I would think the air coming from the stack itself (which is vented in the above floors) would be more than enough to prevent any siphoning here but I want to make sure that is the case and what is code saying about it? what are the conditions for a pipe to be acceptable as a wet-vent? And, if I can't use that as a wet-vent, would an inline vent ( like sure-vent ) suffice in my case?

Thank you in advance for your insights.

a simple echematic of the setup

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