Is there any other way to connect ABS 3" DWV (for a toilet) to an existing 3" Cast Iron hub besides using a rubber donut? We are trying to make the connection and we can't get the ABS to fit with the donut. We have tried putting the donut on the ABS and then hammering it into the cast iron (the ABS just ends up popping out), and we have tried putting the donut in the cast iron with lots of soap on the inside, but the ABS still won't go in.
Any other suggestions? We are really frustrated! Thanks!
Any other suggestions? We are really frustrated! Thanks!