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Thread: Toilet drain line size
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07-30-2010, 09:36 AM #1
Toilet drain line size
Is there a minimum size for a toilet waste line?
I came across a 3" cast iron line from a toilet and it just didn't look right.
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07-30-2010, 10:12 AM #2
Re: Toilet drain line size
Why don't you go ahead and access the New York State Residential Codes?
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07-30-2010, 10:30 AM #3
Re: Toilet drain line size
3" is the minimum size for A toilet.
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07-31-2010, 05:53 AM #4
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07-31-2010, 05:53 AM #5
Re: Toilet drain line size
This was a small commercial office that has a history of the toilet backing up. When I saw the 3" I just thought I would throw it to the forum as all the residential toilet lines I find are 4".
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07-31-2010, 10:29 AM #6
Re: Toilet drain line size
THe Picture is from the New York State Code. Look at the foot note (a.) it states the minimum size of any buidling drain serving a water closet shall be 3" Here is a link to the state plumbing code 2006 New York State Plumbing Code
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A-Archer Sewer & Plumbing specializing in:
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