Timeline for What does section 904.4 of the international plumbing code mean?
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
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| Dec 29, 2021 at 13:51 | comment | added | Jonathan Narwold | Thanks! I think I understand now. This would answer my primary question. | |
| Dec 29, 2021 at 13:44 | comment | added | Tetsujin | Yes. The stack has to originate at the lowest point & vent to above the highest [that applies to either a standard 'old' above roof or newer non-return.] The bottom of the stack can be a T, so long as it's at the [approximately] lowest point. | |
| Dec 29, 2021 at 13:33 | comment | added | Jonathan Narwold | "The linked answer would appear to be talking about the top of the vent, not the base." So given an example like upload.wikimedia.org/wikipedia/commons/7/7b/SoilStack.PNG, the way I would have interpreted it prior to this conversation is that the venting goes from the top-most fixture... but is 904.4 considering the whole green portion part of the vent even though it also carries water, and that's why it says "below the lowest"? Just trying to make sure I'm reading everything properly. | |
| Dec 29, 2021 at 13:25 | comment | added | Tetsujin | The linked answer would appear to be talking about the top of the vent, not the base. There is a modern alternative to venting above roof height, a vent with an Air Admittance Valve, ie a one-way valve. these can be installed below roof height [200mm above the highest water entry point]. | |
| Dec 29, 2021 at 13:23 | comment | added | Jonathan Narwold | Everything is sloped 1/4 in per 1 ft of pipe. Outside the structure is 4 in I believe; reduced down to 3 in as it enters the structure. It's 3 in to the toilet, and all the other branches are 1 1/2 in. | |
| Dec 29, 2021 at 13:22 | history | edited | Tetsujin | CC BY-SA 4.0 |
link added
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| Dec 29, 2021 at 13:20 | comment | added | Jasen | I think we also need an elevation (side view) showing the building drain existing and new fitting and sizes of the pipes. | |
| S Dec 29, 2021 at 13:10 | review | First questions | |||
| Dec 29, 2021 at 20:50 | |||||
| S Dec 29, 2021 at 13:10 | history | asked | Jonathan Narwold | CC BY-SA 4.0 |
