fred wrote:

In article , newman
writes

I have had to renew my sink waste in 40mm plastic pipe. What is the best
method of sealing this to an external 3in cast iron pipe? At the moment
the plastic is pushed about 300mm into the cast iron pipe which runs at
a 20 degree fall.

A rubber adaptor is probably as good as anything:
http://www.bes.ltd.uk/products/132.asp , code 11228 (£7+vat+post) (near
the bottom) looks like it would do the job. You could use a plastic adaptor
to beef up the size of the 40mm pipe if the rubber adaptor won't go that
small: http://www.bes.ltd.uk/products/130a.asp code 12993 for solvent or
12987 universal (again near the bottom of the page).

Local plumbers' merchant will prob have them too if you want to save post.
--
fred

Thanks, but there is no room to fit an adapter as the 90deg bend of the
40mm plastic pipe is about an inch from the cast iron pipe. I may need
to use plumbers mate or similar.

Regards