TOTO9BU064E

Replacement fit perfectly in my TOTO Aquia II ST416M.Toilet developed a constant dribble into the bowl. While this didn't solve my problem (needed a new flush valve) the one that was in there was developing some bubbles so it was certainly due.

Perfectly fit my Toto toilet, stopped the leak going into the bowl. It was easy to install.

It was very easy to replace the gasket.

The product is good but it doesn't fix my problem. My problem is fixed by THU224 for now. I will avoid Toto product in the future. All Toto replacement parts are very expensive and tech support promotes unnecessary parts.Here is my experience. A few weeks ago, I called Toto tech support for water leak in a toilet bowl, the agent kindly told me three part numbers to fix my problem. I double checked with the agent and he confirmed all three parts were needed in order to fix my problem. It would cost about $80 to buy all three parts. I searched online to to find lowest cost of parts and "how-to". After my own online research and took the chance to try this 9BU064E seal gasket first (because it's the most common cause of leak.) As 9BU064E didn't fix the leak, I tried the next possible failed part, THU224. THU224 fixes the leak but the agent didn't told me 9BU064E is included in the THU224. Why the agent told me to purchase an extra 9BU064E seal gasket is till puzzle me! If you wonder what the 3rd part number was provided by the agent, it was TS810DV2. According to my research, the failure of TS810DV2 should cause leak outside of toilet bowl not inside. Disclaimer: Since I'm not a toilet expert, maybe, TS810DV2 would case leak inside of toilet bowl.

You're buying this because your Toto toilet (Aquia II in this case) has a slow leak, perhaps fast enough that the valve chatters every 10 minutes to top up the tank. $8 for a small flat disk seems a bit of a ripoff. However, if you, like us live in a wet environment (it rains all winter in the US Northwest), you'll have mold. If you have mold, you'll need to use a chlorine product to control this. If you do that, you'll have another leaky valve. The purpose of this note is to double your money. If you replace this valve, you remove the plastic keeper and extract the disk valve. Chances are good that if you just flip the disc over, the valve will again seat fine. Mine did. I have two Toto Aquias. I bought 4 valves, expecting to insert two new ones and having a spare for both. I now have 9 spares; and can keep using Chlorox and 2000 flushese with impunity. Even if you don't want to save money, you'll now realize that you can turn your valve over and have a functioning water closet while you wait for your new valve to arrive from Amazon.You're Welcome!

Has a smaller hole so I finally found my fit! Tried a lot of American ones but their holes are just too big. I’m using it all the time and recommend everyone try the smaller holes made in China before settling with the tun of the mill holes available locally. Are we talking about toilets? Never mind…

Fits perfect and its easy to install once you get the hang of it. I have 3 Toto toilets that I installed over 10 years again, and have since discovered that the original gaskets hare wearing out. Replacing them extends the efficiency of these toilets. the first time I replaced the gasket, it took me about 20 minutes to figure out how to do it. The second time I replaced the gasket in 1 minute. The only problem I have is with the price. $20 seems a bit high.

Just what was needed to fix the Toto dual flush cartridge style toilet that sprung a small leak which caused the toilet to constantly refill after every 10 minutes. This was just the thing needed and now no more water refill sounds in the middle of the night.

Seller responded fast. Curtious. It works in my dual flush toilet.

Fixed that pesky running tank water... bought 2 so I would have a spare

Very fast shipping. Will use this site again if needed.

saved a lot

Works as designed, easy to install.