Creative solution for damaged clay sewer?

My 110 year old house has two sewers. The newer is cast iron hub & spigot. The older is 6" clay. Both connect as I have determined from a hose test and tracking the line with a snake and a sensor.

One riser from the kitchen connects to a clay stub coming up through the basement floor slab. Part of the clay hub is broken (was packed with concrete to transition to galvanized). I installed a new riser from the kitchen to this hub and have temporarily stuck the riser into the inside of the clay hub and packed it with oakum and caluk.

Any bright ideas for a permanent installation? The ABS mechanical couplings which are designed for transition from clay will not work. Too much of the flange is missing nearly flush with the finished floor. I am considering boxing out (about coffee can size) a form and pouring 4" of mortar or grout as a curb to anchor the stub in place. This would give it a little more rigidity and prevent further damage to the clay.

Banded coupling

Thanks for the thought, but the clay hub is broken at the finished floor and the 6" clay to cast/pvc banded coupling won't bite. I thought about a compression fitting that would fit inside the 6" clay and receive a a 2" or 3" riser, but I've only found these for 4" hubs.

with that age plumbing, you accept some imperfections..

if the oakum/ caulk is ok, you might be satified withit as is.
i like the concrete pour idea, also.
Neither one is perfect, but unless someone has some better idea, i would acept either of you choices.

Being bound by the code and all, cement and such are not approved so I, myself would get out the jack hammer and start digging back to where I could properly make on to the pipe again.

nhmaster said:

Being bound by the code and all, cement and such are not approved so I, myself would get out the jack hammer and start digging back to where I could properly make on to the pipe again.

Click to expand...

In other words, you're a plumber as opposed to a hack. Ever wonder why no one ever lists hack as an occupation?

No offense Ben, but your questions seem out of line for someone who lists his occupation as plumbing designer/mechanical engineer.

-Sam

clay

IF that is a clay bell/hub at the floor level there were NO couplings which would fit OVER it even if it were not broken. They are designed to connect to the pipe itself, so you would have had to cut the bell off anyway.

"creative solution"

Noted.

I'll leave the packed joint until I can excavate and replace the clay elbow with a cast elbow coming up to a hub at the floor.