In article , Lobster davidlobs
writes
fred wrote:

Sorta like 12710/12716 he
http://www.bes.ltd.uk/products/121.asp (near the bottom)
but sized for your steel pipe, sure your merchant will find something if you
go armed with the right measurements. Mentioning you want something
like a WC pan adaptor but different might save on the explanations.

Ah, right - I've used these before in a horizontal situation but for
some reason it hadn't occurred to me they'd work vertically too! Having
said that, I'm not entirely sure what interface I have with the clay
pipe... if you look at my photo, the steel pipe is sitting on a
horizontal, flat section of the clay pipe, and *that* is level with the
floor - ie, presumably the internal bore of the clay pipe must be less
than the external diameter of the steel pipe. Or is there likely to be
some form of internal rim on the clay pipe, which the steel pipe's
sitting on? Can't really see what's going on, and I'm not familiar with
the geometry of the 'socket' on a clay pipe. Don't want to cut it all
off flush with the floor unless it will definitely work, obviously!

I think the steel pipe will just be sitting there, no socket other than the part
that has broken and just the mortar will have been holding it in place. Now
that it is broken I don't think you can rely on it sealing properly again so a
rubber sealed adaptor socket is the way to go. I think your confidence will
be raised if you go to your PM to have a chat and see what they have.
Locally I have a drainage specialist who doesn't stock regular plumbing
stuff at all and it is there that I would go if I was in your spot, perhaps you
have a similar outfit in your area. Ideal would be to remove the steel pipe to
check socket & pipe dims but I can understand you not wanting to do that
until you get the necessary bits. Get the to the PM :-)

Btw, the fact that it has leaked at all (if the socket wasn't broken before)
suggest that the soil pipe may be backing up a bit, just thought I'd mention
it.
--
fred