Fluidmaster 5403 Universal 3-Inch Toilet Flapper, Water Saving | Silicone seal lasts up to 10X longer, Adjustable dial saves water, Kink-free chain, Resists chlorine and hard water

11/10 customer service. I bought a Fluidmaster 5403 3-Inch flapper in November 2021. In March 2026 4 1/2 years later it had developed a small blister on its O-ring and would not seal correctly. Typical wear I assumed. As I was ordering another one I saw it had a ten year warranty. After ordering the new one I went to the Fluidmaster web page and found the warranty information. I filled in and sent the warranty form and 45 minutes later I got an email with a FedEx tracking number saying a replacement part was on its way. The new part got here in 3 days. This flapper fits perfectly - took on a minute to install - and works great. Not only is this a great part that does the job the customer services was bonkers good. From now own Fluidmaster will be used for all my toilet needs. The people at Fluidmaster shall sit amongst the chosen.

I bought this because a couple of toilets were constantly running, and this fixed the problem immediately. Installation was pretty simple, just a few adjustments and it was done. Pros: • solved running toilet issue • straightforward installation • good seal once installed • has held up well for a couple of months • 10-year warranty adds peace of mind • great value for money pack • great replacemnt Cons: • no major negatives so far This ended up being a simple but very effective fix. No issues since installing it.

This toilet flapper worked out perfectly.

I had to replace the flapper in a Delta Prelude toilet so I obtained a "Korky" replacement flapper from the local home store. It is very floppy and did not provide a consistent seal, resulting in water leakage. Then I ordered this part as a replacement. It's made of a harder plastic material and so far there have been no leaks and it was easy to install. One minor complaint; the mounting "ears" could be improved to provide finer adjustment so as to eliminate side-to-side play. As it is, there are only two possible positions for each "ear".

After just a few days use, i am compelled to write a review on this product. 1. It is well made and look and feels high quality 2. The detented adjustments allow a wide array fitment, and the detent positions hold very well 3. The flapper is adjustable for the length of time the flapper stays open.. which is nice 4. Easy installation... almost too easy Now... the primary reason for my review is the following 5. The longest "flap open" setting of 10, leaves about 3 nches of water in the bowl, which made me concerned.. as this was the longest the flap could stay up ( 10 was Max) BUT 6. I watched the actual bowl flush and it was a complete, full length flush.. 7. I confirmed this by leaving the tank cover off for three days, and the tank would have about 3 inches of water BUT still allowed a complete flush This is a real water saver, as the flapper it replaced would drain down to about an inch.. I was concerned that the flapper was closing too quickly to allow a full flush BUT it does allow a full flush Great product

Works great I use these on all my toilets. They have a larger diameter and they are more rigid so they really stop the water follow once the toilet flushes! Best I have tried!

I bought a new flapper and a clearly used and damaged one arrived instead. Too damaged to even make a seal... So that was deeply annoying. Replacement part did make a very good seal, and was easy to install.

My old toilet flapper had warped over time, and our toilet tank had started refilling almost constantly due to the failed seal. The rigid structure to the flapper means it won’t warp over time like the cheap rubber one that came with my toilet. It stopped the problem immediately upon installation. Installing and adjusting this new flapper is also MUCH easier than the old one, because the piece that fastens to the lever is a much more practical design. The “bulb” is really interesting as well; you can turn it to let in more or less water, which causes it to float longer or sink faster, thereby closing the drain slower or faster, depending on how much water you want to use or how strong of a flush you want. I chose to keep it all the way closed, so it stays full of air and floats on top of the water as it drains down. This causes almost the entire tank to drain before the flapper closes. I did test it with the bulb at different levels and it makes a BIG difference in how quick it closes and how much water gets used, but the toilet I was installing this on has issues flushing sometimes, so a stronger and more consistent flush is part of what I was looking for. Pros: • Works great • Won’t warp over time • Adjustable water-saving feature • Easy to install and adjust Cons: • A bit more expensive than some of the other options. I needed two new flappers, but chose to only buy one to make sure it worked. Despite it being more expensive, it was so easy to install and fixed my problem so immediately that I came back and bought the same one the next day.

Muy bueno, quedo a la medida

it fits well in my toilet and it does the job - no more leaks, i am not wasting water. Installation took 3 minutes.

Recomendable.

Reviewing after 6 months, and this product still works

Good to have for emergencies