Hello I need to know how I would hook my airvent up to the new bathroom I was putting in my basement? Also my main drain pipe runs along the inside wall of my basement slowly droping beneath the slab, How would I tie into that for the shower and toilet? Would the airvent tie into the pipe that I run to that main from the toilet or could I just tie it into the main drain where I tie the toilet drain in? Is it possiable that you would have a diagram of how this all would tie in?

Thanks -Dan-

Most bathroom groups are roughed in like this.
Toilet connects to sewer main. The toilet wet vents through the lavatory vent. Lavatory connects to toilet drain and runs a vent out the roof or revents back into a dry vent in the attic off the top the stubout tee. The shower connects to the lavatory drain and is wet vented by it. This is a normal rough in and is acceptable both by local and state codes but also The Standard Plumbing Code Book.

The hardest part about installing a bathroom in a "add on remodel job" is the drainage and venting. The floor has to be jackhammered up and the sewer main located. Then after you branch off the main you have to jackhammer the cement up and trench to pick up each fixture. Water will also have to connected and laid in the trenches to supply the fixtures. A bathroom group vent will then have to installed off the lavatory and go through the roof or revent back into a existing vent in the attic. In a two story house this can be a real hassle. Then the basement floor will have to be patched and tiled over to hide the patches. Again, I'm not there to see what difficulties you will run into with the drains and vent so I'm speaking in general terms. I hope I've given you a little clearer picture of what's involved. Regards, Tom