vent toilet

I hired a handyman to convert a 1/2 bath to bull bathroom in my basement and am fairly sure I found a few code violations. I am looking for some help confirming before I talk to him tomorrow morning. I am considering contracting with a plumber to get this fixed correctly and letting the handyman...

I'm having trouble fining a clear answer to the this question in the NSPC book... After a toilet vent extends vertically up a wall cavity into the ceiling, is there a limit to how far that vent may extend horizontally before it reaches the vertical part of the main vent stack that extends to...

Hello, I want to add a bend to my vent stack before it goes through the roof. Is this ok to do? The vent serves one shower drain and one toilet drain. See photo. Green is what it does currently. NOTE: I'd like to REMOVE the GREEN LINE entirely, and replace with the yellow line. Will this still...

If you have only a single toilet on a 3" or 4" (I can choose) line feeding a 4" main with a nearby 4" true vent, how far can it run before it needs it's own revent?