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    DWV for 2nd floor with 2x10 joists 12" OC

    Thanks for the clarifications and pointing out that 904.1 doesn't use the term vent which adds to the possible interpretations of that section. Seems like I should talk to the AHJ to get some kind of definitive answer on that.
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    DWV for 2nd floor with 2x10 joists 12" OC

    Wayne, that's basically what I think I'll do regarding changing the bathroom 3 stack to 3" and then I'll likely run that through the roof due to the ambiguity. Not pictured, there are two additional bathrooms on the first floor which is why I have the building drain as 4". Reach, certainly...
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    DWV for 2nd floor with 2x10 joists 12" OC

    I mistakenly assumed I was quoting the IPC but it looks like it may be an NC specific code (section 904.1) which states the 2" minimum through the roof and adds "Such stack shall run undiminished in size and as directly as possible from the building drain through to the open air or to a vent...
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    DWV for 2nd floor with 2x10 joists 12" OC

    Much appreciated, all the comments make perfect sense. For the main vent reduction to 2", is it fine to just reduce from 4" to 2" coming out the top of the san-tee? Didn't know if doing so would technically violate the main vent stack running "undiminished in size" from the building drain to...
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    DWV for 2nd floor with 2x10 joists 12" OC

    I'm in the process of planning the 2nd floor DWV lines for my house. Or more accurately redoing them with the reality of very limited space between floor joists that are 2x10s 12" OC. The attached drawing represents my current plan (1st floor plumbing is omitted). The first floor sits on a 4...
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    Pipe Reduction At House Entrance

    Thanks for the help. You’ve confirmed that I wasn’t missing anything essential. And Jeff, you nailed the exact situation - wrong hole size in the foundation
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    Pipe Reduction At House Entrance

    Currently I have a 1" meter at 55psi that connects to 1 1/4" pipe running to the house, about a 40 foot run. At the house entrance it reduces back to 1" for 2 feet before going back to 1 1/4" inside the house. The total developed length is then about 150 feet. Looking at the WSFU charts, if I...
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