I realty appreciate the constructive criticism. I thought about what everyone has said and went back to my basic books and made a new plan. I think this addresses the issues raised. Its a bit weird but I tried to get the vent to exit at vertical. This time I also drew in the toilet DWV. Before the start of all of this the main stack was 4 inch cast iron turned and went horizontally under the toilet so they just put a tee on its back for connecting the toilet. the fitting were very corroded and thin on the bottom especially under the toilet. also it was only 13 inches Center to Center main stack to where the toilet needs to feed into that pipe. I rebuilt it the way it was made before and realized that was not a good idea so i rebuilt it in the only way I thought it could fit and work. But now after listening to the pointer on what not to do which has lead me to what is in the drawing now.
Last edited: