Product review (5 stars): Works with Waste King 8000 Too.
I bought a Waste King model 8000 to replace the 15 year old InSinkErator in this house. Unfortunately the only discharge tube supplied with the Waste King was a 90 degree bend. To use it as-is I would have had to create a much longer series of pipes that included 360 degrees of turns to mate up with the original drain system. So I bought this InSinkErator flexible discharge tube. I was very skeptical that it would work because right through the packaging I could see that the metal bracket would not fit over the plastic flange. Furthermore the packaging clearly states that this product is for certain InSinkErator models. Then I read about softening the plastic in hot water and forcing the metal bracket over the softened plastic. That worked just fine. You don't need to heat the plastic up much. 30 seconds in very hot water should do it. Put the metal part on first.

Now which way does the black neoprene gasket fit? Clearly there is an internal groove that fits over the white plastic flange, but there are two ways to install it. Notice that one side of the black plastic has a thin lip but the other side lacks that. Install the black plastic such that the thin lip faces the corrugated part of the tube. It will serve to center the metal part properly with respect to the black neoprene.