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Old 06-16-2010, 09:53 AM   #1
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Basic vent piping


I'll be redoing all the plumbing again now that The new rooms are going in.
Looking for a basic stinkpipe diagram to show me the do(s) and do not(s) of running the kitchen sink, bathroom sink(s) shower(s) and toilet(s). I'm thinking of adding a half bath. All fixtures are on the same level over a crawl space.
The new plumbing will be run through the walls inside the home as much as possible to avoid freezing temps down below. I'm trying to think through the vent pipes for all the fixtures. Any advise is greatly appreciated. I figure the more I know before I start, the faster I'll finish, doing it right to pass my inspection.

Thanks guys!

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Old 06-16-2010, 10:08 AM   #2
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Basic vent piping


Are you talking about like an ISO? Or are you looking for some other type of diagram?

The only thing an ISO really shows you is sizing, it doesn't really show fittings very well and length of piping. . .

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Old 06-16-2010, 10:28 AM   #3
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If I knew what an ISO was, (besides a cd image file) that might help with my answer. LOL

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Old 06-16-2010, 12:47 PM   #4
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Basic vent piping


If you can diagram where you plan on putting the sink, toilet and tub with an outline of walls in your space, and which direction you need to go with the waste line, I can help with designing your system. There are just to many variables as it comes to waste and vent piping, distances, wet vents, etc... to give you any good advice.
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Old 06-16-2010, 12:58 PM   #5
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Basic vent piping


Thanks. This graphic is sort of what I'm needing, just the basic setup. I'll have the kitchen sink, next room is the bathroom, so all vents will be close. I only want to make ONE hole in the roof to vent everything. The existing drains will just be extended 3' or so and also the main plumbing lines I already did a few years back. She wants me to add in a half-bath though, so I'm looking to 'back-to-back' the two toilets, one on each side of the wall, same with the two vanity sinks. But I imagine I'll be needing a new drainpipe for going under two toilets like that?
Also, in this graphic, there seems to be no vent for the tub/shower, is that right?


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Old 06-16-2010, 01:35 PM   #6
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Basic vent piping


You can take the 2nd toilet into the same stack, no problem. You have to com off the bottom of the toilet and pipe to the 4" line the same way it pictured, only mirrored. Also, in the picture, the vent for the toilet is actually wet vented through the sink drain. A wet vent serves two purposes, it drains the water from the sink and acts as a vent for the bathtub. Perfectly legal in the configuration shown in the picture.
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Old 06-16-2010, 10:02 PM   #7
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Quote:
Originally Posted by The Engineer View Post
You can take the 2nd toilet into the same stack, no problem. You have to com off the bottom of the toilet and pipe to the 4" line the same way it pictured, only mirrored. Also, in the picture, the vent for the toilet is actually wet vented through the sink drain. A wet vent serves two purposes, it drains the water from the sink and acts as a vent for the bathtub. Perfectly legal in the configuration shown in the picture.
Not in Oregon.
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Old 06-16-2010, 10:07 PM   #8
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Basic vent piping


Explain?

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Old 06-16-2010, 10:26 PM   #9
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Basic vent piping


Each fixture requires its own vent EXCEPT when wet venting, in which case wet vents are required to be vertical drainage only.

Drain may not intersect another trap arm (between fixture outlet and vent opening) must intersect a drain only.

but that's just oregon. I know everyone has their variation.

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