The previous owners or their contractors replaced the the trap and vent of the only tub. It was cast, probably with a drum trap, and now is PVC straight from the floor drain and overflow to the original cast. It appears that the new PVC is just stuffed into the cast bell as when the tub is filled and then the drain is opened quite a bit of water backs up out the bell/pvc joint. I would love to find a good and reasonable way to apply some sort of sooper dooper magical plumbing stuff {tm} to the joint, as is, and realistically expect it to stop leaking. It suspect this is fantasy and that the best thing to do is rent a breaker, remove the bell, and then use a FernCo to join the PVC and cast. IS there such a thing a FernCo style hub to put inside the cast bell to seal against PVC? Any other creative thoughts as getting to the cast from the crawlspace is gonna be a long, tight dirty scramble?

Thanks, Bob

 

There are rubber gaskets "doughnuts" made that the plastic pipe slip into when joining plastic pipe to a cast iron bell. Even though you put some slickum (TM) such as wd-40 or soap solution on the pipe and shove it in place, it is next to impossible to pull it back out, so be sure you have it positioned properly.

Other option is the oversized fernco for a bell to pipe fitting. Looks like a real neat funnel made out of rubber. These a hard to find in some plumbing supply houses but they can be ordered from Fernco.

Hey, good luck with your project....

 

I'm not a pro, but have been told the best way is to use oil-impregnated oakum. It's packed into the joint and then topped off with plumber's epoxy.