I am replacing a toilet in a bathroom with a concrete floor. When I took
the old toilet out, I found that the old plastic flange was cracked. I got
the old one out and got a new plastic flange to go into the pipe in the
concrete slab. The new flange has a rubber ring built onto it for going
into the drain pipe. Is there something I should do to attached the flange
to the drain pipe to ensure that the toilet will not wobble once it is
attached to the flange?