After only two years of use, the toilet is not flushing completely. I have spent over two hour on the phone trying to get in touch with a representative to assist me. I have still not gotten through. I had a major remodel back in 2019 of kitchen and bath. I researched many toilets and the salesperson recommended the Champion 4. But after just two years I am already experiencing issues despite nothing being visibly broken. The Delta toilet I used for upstairs bath remodel is still going strong after almost 10 years. I do not use tank cleaners and all parts seem to be functioning fine. I have max adjustment to use as much water as possible but I still get incomplete flushes. I wasted 2 hours on hold trying to use American Standard s help hotlines.