can pipe be vent & drain?
Posted by gates on June 27, 2002 at 17:14:41:
we are remolding a second story bathroom with access to the pipes in the joist from the first floor (ceiling on first floor has been removed). The toilet sits over the 3" drain with two 2" pipes running from the 3" drain, the first to the sink (6.5' away) which has a 2" studor vent and the second to the tub and shower (3' away)which has a 2" vent to the rooftop. My question is can a portion (30") of the tub/shower drain be considered both a drain as well as the vent line for the toilet? If not I can tie in the tub/shower drain to the sink line, but I would rather not use the hole saw on the joists unless I need too. Thanks.

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