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 Wet Venting question
Author: 5280plumber (CO)

In a bathroom group i have a 3" drain going straight to a tub, with a 3x2 wye going to the lav(studered) and a 3" wye going to the toilet. Right now the lav is the first fixture in the drain line and the tub is the last. Its my understanding that the lav would either have to be the second fixture in the drain or the last to properly vent the bathroom group. Could anybody tell me if i am right or wrong on this?

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 Re: Wet Venting question
Author: SwimRunPlumb (MI)

That is correct. What you described is not allowed because it is two fixtures on the same branch. Think of the drain going to the lav (vent) as the main vent. Each fixture must branch off from it independently.

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 Re: Wet Venting question
Author: packy (MA)

typical bathroom group wet vent..

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