Re: vent stack
Posted by hj on April 23, 2003 at 08:56:48:
In response to Re: vent stack
Functionally, you can make the change is size, but if it is going to be inspected your code may require a continuous 4" pipe rather than a total of 4" venting. You can offset the vent pipe with as many elbows as necessary.

: I have a 4inch cast iron vent stack that is in a wall in my kitchen (only thing that vents to this is one toilet in the basement). I want to move this wall in my kitchen to make it bigger. Is it feasable to go from 4inch cast iron to 3inch plastic? Also is there a limit to how many 90 degree turns I can make on this vent stack, I will have to make a total of three for this project. Thank you for your help.




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