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floor plan

I am installing a basement bathroom (sink, toilet, tub) and curious about venting properly. I am going to run a 2 inch vent up past the sink drain. I would like to know how to properly vent toilet behind the toilet flange, going up into the wall that will be built behind it. I've attached an example of what I would like to do to vent the toilet. I would like solutions not just know what is wrong. Also do I need a separate vent for the tub?

  • Hello, and welcome to Home Improvement. It isn't clear; is this a view of a horizontal area? What slopes are you planning for the pipes? – Daniel Griscom Jan 5 at 20:54
  • Yes, this is a horizontal area. The picture is of the slab cement in my basement. I have it excavated already and ready for pipe to be laid. It will mostly be 3" pipe so minimum 1/8" drop per foot slope. A little more where the 2" pipe will be laid. – Joe W Jan 8 at 15:59
  • Do to my depth of my main waste line coming out of the house I will not have enough depth by the time I get to the toilet fittings to do the setup the picture I posted shows. I believe I need to tie into my 3" pipe down stream, just past my 90 degree fitting and 45 degree back toward the wall with a vent pipe and then another 45 to bring it up into the wall (for toilet vent). Let me know what you think or if further clarification is needed. – Joe W Jan 8 at 15:59

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