Adding New Toilet Upstairs

Discussion in 'Toilet Forum discussions' started by FGMAZZOLA, Feb 2, 2006.


    FGMAZZOLA New Member

    Feb 2, 2006
    I live in a 1 1/2 story home in Houston, Texas. Upstairs is all gameroom. I'd like to add a 1/2 bath. Directly below my planned location is my master bath toilet. Of course, coming up from that toilet is the vent line. I'm no plumber, but I do know that I can't use this line as my waste line from above; at least not with a conventional toilet. So what can I do? I was thinking of running a line down inside the outside wall of my house. Once I reach the first floor, place a sweeping 90 through the outside wall immediately connecting to another sweeping 90 pointing towards the ground. An option here would be a sweeping tee so I could put a clean out here in the vertical. Continuing, I would then run the line underground approximately 25' and tie into my existing line leaving my house running to the sewer main. I hope this makes sense. Am I thinking right or are you laughing so much you'll have a hard time responding? Looking for some help. My house is brick veneer and sitting on a post tension slab. Thanks for the imput.
  2. jimmym

    jimmym New Member

    Nov 21, 2005
    New York
    In my previous house, the sink drained into a vertical pipe in the wall. It continued up to the drain for the shower above. From there it continued into the attic as the vent.
    I'm not sure what the problem is? If the pipe is big enough, use it as the drain. If not, replace it with a bigger one and continue the vent upwards. It HAS to be easier than what you described.
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  4. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona

    You were doing good until you mentioned the post tensioned slab. That means you cannot break into the floor to conceal the pipe or make a connection, so the way you describe it might be the only, or at least the best, possibility.
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