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Old 11-20-2007, 01:33 PM   #1
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Drains and venting

Just removed an old kitchen from main floor of house, framed 2 new rooms that are to be a washroom and a laundry room. The old cast 4" stack and a 1 1/4 steel vent already exist, is the 1 1/4 vent enough to support floor drain, tub, pedestal sink, laundry sink, and washer drain?
Anyone from ontario with the code book?


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Old 11-21-2007, 10:24 PM   #2
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Depends on a lot of variables such as drain sizes, distances and floor plan however since no one else has answered I'll jump in and say I would like to have a 2 inch stack at the end of the run if it was possible. If not I guess you work with what you got. Sorry, here in the backwoods of VA we're not to familiar with the codes up north. Good Luck.


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Old 11-22-2007, 09:25 AM   #3
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You really need 2in for that. You're also doing yourself a favor getting rid of that galvanized.
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Old 11-22-2007, 12:25 PM   #4
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Check the Ontario building code, as I recall (4 years ago) you must have 3" penetrate the roof, no if's and or but's about it.

I built one house up there and the plumber (new guy) had two vents going out, the one on the main line side of the house was 3" all the way, there was a powder room/laundry on the other side of the house and it was vented up 2" into the attic and he converted to 3" before he went out. I asked both him and the inspector and they said it was code for 3" out the roof.

I still have my OBC book here, I will try to look and find the reference this weekend
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