I have a 2nd floor bathroom in an older house that i'm remodeling. In the corner of the bathroom there is a 4" cast iron drain\vent that everything in that bathroom currently ties into. Currently there are no individual fixture vents. 2 questions:
1) are fixture vents necessary if the distances for the lav, tub, and toilet are all within 7' of this 3" drain\vent?
2) If vents are needed can i run a 3" pipe over to the toilet and use a 2" wet vent of of that to the lav as the vent for the...
Venting question - 2nd floor bathroom
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