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Old 06-12-2013, 02:54 PM   #1
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Future addition-proof plumbing


I am converting an enclosed first floor porch into a mudroom and 1/2 bathroom. Over this area is a sloped roof area/closet (second floor) that I will likely be converting to a master bathroom in the future.

On the first floor, I plan to run a 3" DMV pipe from the 1/2 bathroom toilet to the basement where a 4" pipe awaits. The toilet will only be a foot or two from a planned 3" vertical stack that will run up through the roof on the second floor.

The future master bathroom toilet would be directly over the new 1/2 bathroom toilet (and also a few feet from the vertical stack).

Do I need to run a separate vent for the first floor toilet (now) so that I won't need to add one when the 2nd floor toilet is added?

Thanks,
Todd

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Old 06-12-2013, 03:30 PM   #2
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Future addition-proof plumbing


In a word--YES--use a separate vent for the first floor toilet--2"---

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Old 06-12-2013, 04:28 PM   #3
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Future addition-proof plumbing


Please post a drawing of what you intend to do.
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Old 06-12-2013, 09:59 PM   #4
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Future addition-proof plumbing


As ghost mentioned post a drawing its a simple set up but can be tricky getting the combinations correct.
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Old 06-13-2013, 10:39 AM   #5
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Future addition-proof plumbing


Here is a diagram of what I'm trying to do.

Thanks,
Todd
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Old 06-13-2013, 05:20 PM   #6
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Future addition-proof plumbing


Cant do it that way, are there any lavs tubs showers etc, going in as well?
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Old 06-13-2013, 06:20 PM   #7
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Future addition-proof plumbing


As Javiles said You cannot do it that way.

You will need to cut in another y in your basement 4 inch and run it to the 2nd floor toilet.
Then vent the second floor toilet about 42 inches above the floor into your existing vent stack. Vent is air only.. No lavs for washing them poop covered hands?

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