This TOTO THU106N, put out by TOTO, is a replacement flush valve for the Promenade toilet from TOTO. If you’re noticing a problem with your toilet when it comes to flushing you may want to consider replacing the flush valve.
This flush valve is made for the Promenade toilet and as such should only be used with it. It is designed to replace the THU106N-1 valve and bring life back to your toilet. Replacing a toilet is a costly and lengthy procedure. If your Promenade toilet breaks down just replace the offending part, rather than the whole toilet.
TOTO put time and care in to the toilets they make. They put this same level of care in to the replacement parts that help keep those toilets going. There’s no reason not to switch out the Toto Promenade flush valve with this spare part that will fix your underlying toilet issue.