Hi, I'm working on a house (built 1930). The cast iron drain from the second floor bathroom, which looks original to the house, is now exposed as the ceiling and wall have been removed from the room below. It look in good shape, at least from the outside - which I guess can be deceptive. I am...

I have a leak from a 4 inch cast iron vent pipe in my basement. It appears to have rusted through and it is dripping. It is very smelly. I am not sure what can be done to fix it. I am guessing it is just rain water that has collected in the pipe that is rusting it out. Since it is just a vent is...