Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: Will this flapper fit the ST 743S? Also, just to confirm, this one doesn't have the water saving hole right?
Document: Matched original size flapper perfectly. No more noise or running water. Easy installation, just had to adjust chain to right size.
Our original Toto is over 5 years old now. The flapper recently broke where the chain connects to the chain. I tried drilling a new hole, but there is a slight difference in pull and it didn't feel right on the handle. I saw cheaper generic versions of this flapper available, but for just a few dollars more I figured to go with the OEM. Install was straight forward and easy.
When flushing, the toilet tank did not empty of water. This clapper, without a hole in it, was needed for the toilet to flush complexly, and the toilet tank to empty.
It seems to work differently than my old one did. I had to move the pull chain to a different hole on the flapper lever
Even though box of another brand said it fit Toto it didn't. Be sure you have right model number of Toto.
For some reason, not enough water was running on flushing (our toilet is one gallon/flush).Since it was not the typical leak problem caused by aged flappers, I was not sure if the replacement of the flapper would fix the problem. I still do not know exactly what was the problem but anyways, the new flapper has been working great.
I learned a long time ago that when repairing an old toilet flapper to get the exactly right one or you'll have problems. This is precisely the right flapper for the TOTO low-flow toilet. One of the weak spots in the otherwise flawless TOTO toilet is the flapper--in particular the rubberized loop that connects the flapper to the chain. If an over-zealous flusher pushes too hard, it's possible to rip the chain out of the loop.
This is flapper is a bit more expensive than regular. But you will get a Genuine TOTO product and perfect fit.The weakest link is the rubber tip where the chain hooked into. Mine broke after 4 years of use. But this flapper does come with 2 tips so basic you can re-hook to another one if needed.
This was very easy to install. I bought a generic one in the store that would not work, and then found this one. It is just a replacement part, but made the job easy to do. Also a lot less expensive on Amazon.
The one I bought at Ace hdwr never worked quite right. This is the real thing. And it's easy to install.
Answer: yes