Hi..I’m new to the forum and am in the process of finishing my basement. I am adding a bathroom where there is already some rough plumbing. I know I will have to dig up the concrete but my concern is the venting of the pipes. The books I’ve read only discuss venting from an upper floor and not how to vent from a basement bathroom? Anyone have any ideas suggestions? I will post some pics later this evening. There is already a vent coming out og the concrete, but not sure if it can handle the toilet, tub and sink…Thanks for your help!