The message
from Lobster contains these words:

It's a straight pan connecter running into a sawn-off piece of solvent
weld pipe. You may have trouble removing this, it looks as if gap
filling solvent cement has been liberally applied! What a ghastly
looking job. Look at the overflow, too! I'm sure you can improve this!

Don't see what problem is - the white pan connector should pull straight
out of the grey solvent-weld pipe, and can be replaced. What's the
point of changing the grey pipe, as you seem to be suggesting?

I think he's thinking the connector's been somehow glued to the pipe. At
first glance it does look like that, but on close inspection I reckon
what appears to be a ring of solvent-weld gunge is actually the chamfer
on the pipe.

--
Skipweasel
Pay no attention to that man behind the curtain.