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Old 02-18-2012, 10:25 PM   #1
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Moving bathroom.


Hi all, my first time posting so I do apologize ahead of time if I mess up and make things more complicated then they should be. lol

I plan on moving my bathroom from one side of my house to the other side. I do have a couple questions.

- 3" abs running at a 1/4 inch per foot drop(in crawl space) from new toilet,sink,shower to existing stack (estimated distance will be approx. 35 feet). Is this possible ?

- if this is possible I have a 3inch vent at the stack end now I would leave that there and have all fixtures in new bathroom tied into a 2" that I have fed up through the roof.
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Old 02-18-2012, 10:52 PM   #2
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Moving bathroom.


to me the 35 feet is not a problem as long as you have the 9 inches you have to rise to get to new location make sure you use wye's on the horizontal drain pipe and the vent should be a increase to a 3 inch 1 foot under deck then through roof at least 1 foot as long as there or no windows from a second story at least where i live

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Old 02-18-2012, 10:54 PM   #3
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Moving bathroom.


3" pipe is graded at 1/4" per ft. Do you have the elevation to do that?
A typical bathroom can vent with a 2" vent
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Old 02-18-2012, 11:04 PM   #4
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e plumber i agree with the 2 " vent is more than efficient since a bathroom group is 6 dfu's and main to bath is a 3 " but i was taught it is code to have a 3 penetration through roof with a minimum of 12 " below roof deck do you know if that is code
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Old 02-18-2012, 11:13 PM   #5
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Quote:
Originally Posted by jaydevries View Post
e plumber i agree with the 2 " vent is more than efficient since a bathroom group is 6 dfu's and main to bath is a 3 " but i was taught it is code to have a 3 penetration through roof with a minimum of 12 " below roof deck do you know if that is code
I was taught that this is applicable in frost zones only. However, the cross sectional area of all vents must equal the building drain size, he indicates an existing 3" vent will remain.
The only code I have worked under is the UPC so I can't speak for all...
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Old 02-18-2012, 11:15 PM   #6
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Moving bathroom.


thanks
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Old 02-18-2012, 11:44 PM   #7
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All your advice is greatly apprecciated.

Not sure what you mean under deck to go 3" with the vent. But as soon as this 2" vent enters the attic I increased to 3 to go up through the roof. And there is also a 3" vent from the main stack in the crawlspace still.


Under the floor the 2" vent is tied into the 3" drain line.

And would simple galvanized strapping support this throughout the crawlspace until I hit the main stack ?
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Old 02-19-2012, 12:43 AM   #8
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Quote:
Originally Posted by kevin705 View Post
All your advice is greatly apprecciated.

Not sure what you mean under deck to go 3" with the vent. But as soon as this 2" vent enters the attic I increased to 3 to go up through the roof. And there is also a 3" vent from the main stack in the crawlspace still.


Under the floor the 2" vent is tied into the 3" drain line.

And would simple galvanized strapping support this throughout the crawlspace until I hit the main stack ?
"Deck" is referring to roof deck.
ABS pipe needs to be supported every 4ft. Strapping is fine but you should try to eliminate vertical and lateral movement with a stiffener between the pipe and the floor joist
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Old 02-19-2012, 01:46 PM   #9
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Moving bathroom.


for pipe hanging ask for j hooks they are easy to use

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