06:51PM | 02/13/03
Member Since: 02/12/03
5 lifetime posts
I am moving my 1/2 bath from a side wall, to the center of the house. The waste pipe, should not be an issue - I will just drop into the basement and tap into the main sewer line. However there is not much information on venting.

What needs to be vented - and to where.

I will be installing a toilet & a basin, so I imagine, that I can put the two of them together on the same vent line. The line, does it have to go straight to the roof, or can I join it with an existing vent pipe in the attic. Next, what size does it have to be?



06:32PM | 02/16/03
Member Since: 01/28/03
693 lifetime posts
You need to consult your local plumbing code enforcement office for exact details about what you can and cannot do in terms of this relocation.

But generally speaking, the sewer and vent line must be at minimum 3" and to avoid the hassle of going thru the roof or tying into an existing vent stack, you can use an Air Admittance Vent in your attic. See here:



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