If you get a Cadet that isn't defective you're ahead of the game...it has some issues on that front. It may not provide the desired results without a new flush valve. What you might see is that the bowl doesn't fill up to its proper full level since the flush is putting less into the tank, less will go into the bowl unless the fill valve today overfills it a bunch in the first place. So, what you'd notice is that you might need two flushes...the first fills the bowl up and the second really ends up flushing it. The balance between the tank and the bowl would need to be adjusted.