vent stack
Posted by kevan on April 22, 2003 at 23:17:29:
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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