Hi all.
A couple of years ago when I had the yard paved,
the soil stack was found to be an inch or so short
so the stack barely reached the underground whats-it.
The guys then just applied a mortar collar
that has now broken.
Should I replace the section or slap a bigger collar of
mortar on it?

The bottom of the soil stack in the back yard
has broken. The stack is 110mm pvc standard stuff.

Thanks.

Arthur