I'm in the planning stages of a half bath upstairs and need advice on how best to connect the new drain to the existing drain.
The existing drain is a 3" ABS line that connects to the closet flange of the downstairs toilet, drops vertically a foot to an elbow, runs horizontally 2 feet to another elbow (which has a 2" heel inlet connected to a vented horizontal branch), and from there, horizontally another 3 feet to a vented stack.
Can I remove the elbow under the toilet, replace it with a combo, and connect the half bath there?
New bath fixtures will have new vents and drain would be basically an 8' vertical run from upstairs to a combo with cleanout, then a 12' horizontal run to said combo under the downstairs toilet.
Code here is International Residential Code.
I apologize for the lousy drawing I'm attaching but I hope it helps illustrate the above somewhat.
The existing drain is a 3" ABS line that connects to the closet flange of the downstairs toilet, drops vertically a foot to an elbow, runs horizontally 2 feet to another elbow (which has a 2" heel inlet connected to a vented horizontal branch), and from there, horizontally another 3 feet to a vented stack.
Can I remove the elbow under the toilet, replace it with a combo, and connect the half bath there?
New bath fixtures will have new vents and drain would be basically an 8' vertical run from upstairs to a combo with cleanout, then a 12' horizontal run to said combo under the downstairs toilet.
Code here is International Residential Code.
I apologize for the lousy drawing I'm attaching but I hope it helps illustrate the above somewhat.