I live in NYC and I have a plumbing vent pipe which vents through the roof. The vent pipe however has some "angled" pipes which bring it out into a small section of a bedroom to avoid going through the header between the ceiling and the attic floor, the house is balloon framing. The vent pipe then runs back up into the attic where it vents through the roof. The stack is 12 inches to the right of a window. I have two questions.
1. Can I cut the pipe 7 or 8 inches above the window and vent the pipe to the back of the house? There are no other openings other than the window.
2. If I can, how do I close off the roof opening, I don't want to take the roof apart, just close off the vent pipe to prevent water or birds from getting in.
Thank you to all who respond.
Plumbing – Can a plumbing vent pipe be vented horizontally
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Best Answer
You really don't want the vent pipe opening near a window, because of the possibility of the sewer odor coming back into the house. That's why vents are on the roof in the first place — any breeze quickly carries the odors away.
To answer your specific question, yes, vent pipes can have horizontal runs, as long as there is no possibility of them becoming plugged with water. In other words, any water that gets into the vent pipe opening must be able to run freely all the way to the sewer, without creating a "trap".