Thanks for the response, I'll likely end up removing the toilet and opening the wall to see how its vented now, with nothing exposed I have no idea,
Your toilet is probably close enough to the stack that there is no venting behind it. Our code doesn't say that you can't run drainage in an outside wall, just that it needs to be protected from freezing. Way easier to do on an inside wall. Can't you run the drain in the wall, behind the toilet, till you reach the stack? Its not going to freeze in the basement
You can have it good, fast or cheap. Pick two.
Last edited by Canucker; 10-23-2012 at 04:15 AM.