Hello All

I need some help please.

I need to replace the old toilet with new one (Please see Photos) and
I have a few issues

http://homepage.ntlworld.com/mohali/images/loo/1.jpg

http://homepage.ntlworld.com/mohali/images/loo/2.jpg

http://homepage.ntlworld.com/mohali/images/loo/3.jpg

1. What is this big round thing it seems to be connecting the soil
pipe to the white plastic connector.

2. The other problem is that the new pan outlet is a bit lower the old
one. How can I resolve this problem

3. When I am pushing in the new pan into the connector how do I secure
the join.

In summary how do I go about getting this job done.

Many thanks for your help and very sorry about the photos .

Best regards
MA