Direct Vent Basement fixtures?

Discussion in 'Shower & Bathtub Forum & Blog' started by TrickyMik, Oct 6, 2019.

  1. TrickyMik

    TrickyMik New Member

    Joined:
    Oct 6, 2019
    Location:
    Pennsylvania
    Greetings everyone. I’ve been stalking y’all for a good long time. Usually able to find what I need via searching and not having to create an account or post. You guys have helped me install/replace/repair water heaters, water lines, faucets, sinks just to name a few. Alas finally, I need to ask my own question. I apologize in advance as I tend to be long winded for the sake of clarity. Additionally I’d like to thank anyone in advance who takes the time to offer input. Lastly I apologize if this is in the wrong section.

    I have a 2 story home with a walk out basement, (so 3 stories in the rear). Finished bathroom on top floor, kitchen sink on first floor and a laundry room in the basement. The laundry room in the basement at some point the previous owner broke up the concrete slab and installed a toilet. The room isn’t finished so you can see the saw marks etc where they did work to find that main stack under the slab.

    I’m no plumber but, there is no vent and it’s like 2 feet from the main 4inch stack everything is draining into, so I guess this toilet is direct vented?

    My problem/questions are for two reasons. Im pretty certain the previous owner didn’t pull a permit as the county records etc still list the property as single bath not 1-1/2”. So the first question is, would that be considered a direct vent and an acceptable and appropriate setup? I have half a mind to invite an inspector in to get it legitimized. I’m hoping they don’t request that I tear up that concrete so they can make sure the slope and all that is correct. But if they do they do.

    The second part is that being as there is a toilet there already, it is a pretty big room. I would like to make it a legit 2nd bath and put a shower stall and sink in also. But I’m worried about the venting. I’ve read bad things about the admittance valves, and I think it would be very prohibitive to try to tie into any vents on the above floors.

    I read in a the code that anything within 5 feet would be considered direct venting. So that’s my second question. If I layout the new fixtures so that they are all within five feet of that stack and I tie them into it before that toilet that’s already there, would that be acceptable and correct?

    If your require any further info to provide input please let me know.

    Thank you
     
  2. TrickyMik

    TrickyMik New Member

    Joined:
    Oct 6, 2019
    Location:
    Pennsylvania
    After thinking about it some more I guess if I want to tie in other fixture’s drains, I’m gonna have to tear up that concrete and expose it anyway. My area uses IPC 2015 by the way.
     
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  4. hj

    hj Moderator & Master Plumber Staff Member

    Joined:
    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    As soon as you connect upstairs fixtures to the pipe, it is no longer a "direct vent" and cannot be used as one.
     
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  5. TrickyMik

    TrickyMik New Member

    Joined:
    Oct 6, 2019
    Location:
    Pennsylvania
    Thanks for the reply HJ. I appreciate it. All the upstairs fixtures are attached and draining into it. I was sort of getting the impression from some other threads I was reading that this was a no go. So that means this toilet they installed is not properly vented then right?
     
  6. Terry

    Terry Administrator Staff Member

    Joined:
    Aug 17, 2004
    Occupation:
    Plumber
    Location:
    Bothell, Washington
    [​IMG]

    The downstairs fixtures get their own vents. If you can't run a vent upwards then you're looking at an AAV. Make sure it's accessible and has air.

    [​IMG]

    They make a nice box to put them in.
     
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  7. TrickyMik

    TrickyMik New Member

    Joined:
    Oct 6, 2019
    Location:
    Pennsylvania
    Thanks for the reply and the diagram Terry. I really do appreciate you guys taking the time.
     
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