Originally Posted by other022002
We have sewage smell that seems to be coming from the stack pipe the runs from the basement to the roof. Here is some back ground on the setup, now I'm not a plumber so bare with me. This is a older two story house, the vent pipe is cast iron and runs from the sewer pipe that goes out the basement up thru the floor into a closet then on up to the second floor. The first story drains enter the pipe in the basement before it heads out the wall to the world. The pipe is visible in the closet. The sewer smells occurs when water is ran either on the 2nd or 1st floors. The smell must be originating in the closet cause it is absolutely horrible there. The smell is not noticeable on the second story, I can smell it in the basement but not sure if thats just coming thru the floor tho. I have checked the drains on the 1st floor when the smell ocurrs and do not notice any smell coming from the drains, so I assume the traps have water. Any ideas? Hopefully I have given enough but not two much information to be confusing. I will mention that one ideas I've had is to put a P trap on this sewer pipe in the basement when its turned horizonally.