I am considering adding a full bathroom to the 2nd floor of my home built in the 1930's. I have attached a diagram of the sanitary piping layout for both the existing and proposed. I am hoping someone can comment on the proposed piping layout for the new bathroom, how it ties into the existing system, and if the venting is correct.
Here are a couple of side bits of information to go along with the attached diagram. 1) I am not sure of the piping for the bathroom in the basement level since the piping is below ground. Also, I am not exactly sure of the venting for the bathroom in the basement, other than I know there is a vent pipe coming from this bathroom and it connects to the existing main stack above the 2nd floor. 2) The piping shown for how the existing sink in the 1st floor bathroom ties into the main stack is my best guess. The pipes are within the wall and cannot be accessed.
Everything else shown for the existing piping is accurate.
Let me know if additional information is needed to answer/comment.