DWV Layout Questions

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  #1  
Old 05-21-03, 04:50 AM
bbcci
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DWV Layout Questions

Our new, 80 year old house, only has one bathroom, on the second floor. The wife is begging me to install a half bath on the main floor. I have the handyman skills to do the job, but not the knowlege of proper drain waste venting. -- I've drafted out what I could find of the existing system and posted to the below web site with a couple pictures. I'm not sure if and where I can tie into the stack at.
Due to low ceiling in basement, I would like not to make a traverse. Could I wye and 1/8 up from the subfloor line straight up to a closet bend? The new bath will located in the center of the house and not near current stack. For any time and tips you can spare, my thanks!. bill in Michigan
picture and drawing here
 
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  #2  
Old 05-21-03, 01:20 PM
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This is how I would do the drains.



Check your locals code, you might need to stub vent out as 3" in a snow zone.
 

Last edited by Plumber2000; 05-21-03 at 01:49 PM.
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Old 05-21-03, 02:23 PM
bbcci
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Thanks Plumber2000, awesome job with my picture.
Curious about why a new seperate vent through the roof, easier than traversing over to existing stack and tee'ing in, in the attic or is it due to a regulation?
Again many thanks for the nice job done.
 
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Old 05-21-03, 02:28 PM
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You can tie into the existing vent, hard to tell what space you have in attic.
 
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