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Old 01-31-2012, 10:48 PM   #1
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Plumbing Vents / New 2nd Floor Ensuite


I am converting a second floor walkin closet to an ensuite. There are two exterior walls in the room. A 3" pipe is possible to the basement but it can not cleanly continue to the roof. I can connect to the existing vent pipe in the attic. I am not sure of the best/easiest way to properly vent the proposed shower stall/toilet and vanity sink through the walls. I reside in Ontario Canada. Help.... I have attached a rough diagram.
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File Type: pdf Ensuite Diagram.pdf (37.0 KB, 55 views)

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Old 01-31-2012, 11:03 PM   #2
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Plumbing Vents / New 2nd Floor Ensuite


Here in the states you must run a 3" up for the toiet at a min. Then you may reduce the pipe size by 1/2 the pipe area for the vent. So you could use 2" pipe up the wall to connect the lav and then through the roof.

I thinking it will be pretty close to canada rules but not sure. If you don't get a response check with your local code department


3" = 7.0685 sq in area
2" = 3/1416 sq in area

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Old 02-01-2012, 12:01 AM   #3
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Plumbing Vents / New 2nd Floor Ensuite


Yup, min 2" vent for what you're proposing per National Plumbing Code. Check with local authorities, as they may be more restrictive.
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Old 02-01-2012, 12:33 AM   #4
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Plumbing Vents / New 2nd Floor Ensuite


I would use a a AAV or what known as a Air Admittance valve you place between the fixture and the drain pipe and you have to have access to the valve because that can fail and be replaced but it saves time and money and frustration on running new vent stacks. and AAV's you have to go to places like Ferguson's or other plumping out let stores not your lows or home depot or ace hardware.
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Old 02-01-2012, 09:15 AM   #5
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Plumbing Vents / New 2nd Floor Ensuite


I don't have all your answers, so I will pose a few questions that may help you:

1)What is the maximum length for the 3" toilet branch to the stack?
2)What is the proper way to vent the toilet in this application?
3)Can you run 2" drain from the shower and pick up the lav, and use the lav as a wet vent for the shower? If so, what is the max. distance from the shower to the wet vent?
4)Can you run vents through exterior walls?

I am asking these questions to better help the OP get all the facts.
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Old 02-01-2012, 12:11 PM   #6
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Plumbing Vents / New 2nd Floor Ensuite


Quote:
Originally Posted by psilva8 View Post
I don't have all your answers, so I will pose a few questions that may help you:

1)What is the maximum length for the 3" toilet branch to the stack?
2)What is the proper way to vent the toilet in this application?
3)Can you run 2" drain from the shower and pick up the lav, and use the lav as a wet vent for the shower? If so, what is the max. distance from the shower to the wet vent?
4)Can you run vents through exterior walls?

I am asking these questions to better help the OP get all the facts.
Hi, Not sure of the correct answers for #1 and #2. Question #3 sounds possible. I still need to figure out how to vent the toilet properly. Question #4, note sure of the answer either. I was hoping someone could look at my sketch and draw in the suggested plumbing vent lines.

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