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Old 09-11-2010, 06:06 PM   #1
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"Can of Worms" stack vent question


Hello!

Found this vent when I did the demo for the hall bathroom. I was considering doing a skylight but the close proximity to this vent will render that idea moot??? Can a soil stack vent have this angled section? Can I lengthen angled section 10 feet, although major demo to accomplish? Based on an earlier post about a different issue, I thought vents had to connect with the curve going up and not down like in picture.

Need advice, out of sight out of mind...
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Old 09-11-2010, 07:05 PM   #2
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"Can of Worms" stack vent question


>>>Can a soil stack vent have this angled section? Can I lengthen angled section 10 feet,<<<

The answer to both questions is yes, if thats a dry vent you can do almost anything with it.

The question about the direction of the fitting in the picture is yes it is on backwards

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Old 09-12-2010, 09:52 PM   #3
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"Can of Worms" stack vent question


Quote:
Originally Posted by braindead View Post
>>>Can a soil stack vent have this angled section? Can I lengthen angled section 10 feet,<<<

The answer to both questions is yes, if thats a dry vent you can do almost anything with it.

The question about the direction of the fitting in the picture is yes it is on backwards
Thanks! I am going to need to crawl around in that attic space to see if the backwards vent connection is for both the tub, toilet and shower on the opposite wall. Laundry, now a pantry, is the only fixture that could make this a wet vent.
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Old 09-13-2010, 06:54 PM   #4
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"Can of Worms" stack vent question


Well what are the worst type of worms?

The first picture is a panorama my phone created that shows the last connections of the main waste pipe before it turns down and out to the septic system. I have all pipes labeled. The toilet in the hall bathroom is another 4 feet to the left. You can see where it comes across to the main line in the second photo. This toilet has no vent other than the main soil stack vent in the photo to the right. Master vanity has a vent and master toilet might but have not done any demo but in the earlier post with the backward connection toilet is right below that connection. Without even looking up code I know this can't be right. I don't even know where to begin to fix it.

Is that plumbing disaster contest still open?
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"Can of Worms" stack vent question-soil-stack.jpg   "Can of Worms" stack vent question-vent.jpg  
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Old 09-13-2010, 06:56 PM   #5
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"Can of Worms" stack vent question


Total distance from "hall toilet" to "stack vent" is about 15-18 feet.

Above your head in second photo (post #4) outside of room are connections for kitchen sink and hall vanity which both have a vent.
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Old 09-13-2010, 08:08 PM   #6
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"Can of Worms" stack vent question


Is this an acceptable solution found this picture...

I have very little space in-between the current 3" pipe and the sub-floor. I will have to bring it up the wall and over the top of bathroom and tie into the main vent I need to move up 10 ft.?
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Old 09-13-2010, 08:11 PM   #7
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"Can of Worms" stack vent question


In regards to your first photo I'm not so sure it is backwards. Does your vent terminate to the left or right side? even if it is backwards, I wouldn't lose sleep over it. but to change it, cut on the 3 sides and turn it around. Use nohub bands and pvs couplings to reconnect.
I'm still looking at your other pictures- having a hard time following the system but is that a 3x2 santee on it's back at the master vanity? Can't have santees on their back for drainage.
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Old 09-13-2010, 08:16 PM   #8
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"Can of Worms" stack vent question


Quote:
Originally Posted by dawktah View Post
Is this an acceptable solution found this picture...

I have very little space in-between the current 3" pipe and the sub-floor. I will have to bring it up the wall and over the top of bathroom and tie into the main vent I need to move up 10 ft.?
yes it is in my area. we also put lav arms on the 2" vert. vent.
You can lay the 3x2 wye a little flatter too, just keep it above the center line of the 3" wc line
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Old 09-13-2010, 10:05 PM   #9
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"Can of Worms" stack vent question


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Originally Posted by TheEplumber View Post
I'm still looking at your other pictures- having a hard time following the system but is that a 3x2 santee on it's back at the master vanity? Can't have santees on their back for drainage.
Looking at it closely the only way I can describe it is a very short, short sanitary tee. The 2" connection is curved but super short and on very top of 3" section.
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Old 09-13-2010, 11:37 PM   #10
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"Can of Worms" stack vent question


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yes it is in my area. we also put lav arms on the 2" vert. vent.
You can lay the 3x2 wye a little flatter too, just keep it above the center line of the 3" wc line
But just my luck...a nice air duct to complicate things
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Old 09-13-2010, 11:51 PM   #11
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"Can of Worms" stack vent question


roll it to the other side, you can make a surprisingly large hole in those engineered joists. Don't cut into the top/bottom cords though. Contact the joist manufacturer for specs related to hole sizes.
Is there a vent within 6ft of that wc flange?
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Old 09-14-2010, 12:08 AM   #12
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"Can of Worms" stack vent question


Quote:
Originally Posted by TheEplumber View Post
roll it to the other side, you can make a surprisingly large hole in those engineered joists. Don't cut into the top/bottom cords though. Contact the joist manufacturer for specs related to hole sizes.
Is there a vent within 6ft of that wc flange?
I was just in there looking and thought can I do this? Provided a 2" cut out in studs doesn't weaken them too much. Run the 2" up and across to the existing 2" Cut out my 90 degree elbow in my 1-1/2" and bring to a tee. Remove all pieces marked with "X"
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Old 12-03-2010, 12:42 PM   #13
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"Can of Worms" stack vent question


Here's the verdict

Not sure if they were close enough to use the main soil stack as their vent? My new plan will incorporate the proper vents at fixture.
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