Replacing a 4" cast piping with a plastic. What size of plastic can be used?

I have an older home that has a vented stand cast iron plumbing (4-6" diameter), and the joints are sealed with lead. I need to rotate one tee joint (runnuig vertically). Do I have to heat the lead to a molten state to allow rotation? I have never worked with lead sealed pipe and while this...

Hi; I have a vertical 2 inch cast iron vent pipe that I need to remove to install a medicine cabinet. I have cut it in one spot with a sawzall, but there is also a joint in it where I would like to separate it. The joint appears to be poured with lead. If I heat it with a propane torch to get it...

Hi! I just removed drywall to fix a drain from a bathroom sink. I found 1.5" soft lead pipe from the p-trap to a 3" hub on the cast iron stack. Can I use some kind of coupler from the lead pipe to new plastic or do I need to replace the entire length of pipe? If I need to replace, what's a good...

I am installing a toilet in my basement. I have a 4" cast pipe that is flush with the floor (Plug in it,no bell). I am installing a back outlet toilet and piping it over to the the 4" cast pipe. What do I need to connect the ABS to the cast pipe.