[Ted B]

I had an issue with Vacuum-assisted toilet. The problem was someone left the bottom plastic cover on the wax donut. The toilet crushed the plastic, and shrunk the outlet circumference. I installed a new bare donut, problem solved. No more clogging. If it's a donut with rubber liner, it's to be left on. If it's the same plastic material all around the donut. Remove all the plastic, it's a bare donut without rubber seal or flange.

They look similar in packaging.

 

[Ted B]

Here's how this toilet works. I didn't think much of it, because it wasn't working properly. But it works better than the expensive Kohler San Raphael toilet. In that it has a powerful flush, but most notably it cleans the bowl well.

 

[Ted B]

Th

I've used the one you have shown on the right on all the toilets I've replaced, and it works just fine. either the drain on the "Vacuum-assisted" type is different, or you're installing it wrong.

I've explained, there are totally different donuts that people confuse and install wrong.