





🚽 Upgrade your flush game with the ultimate water-saving flapper!
The Fluidmaster 5403 is a 3-inch universal toilet flapper designed for easy installation and long-lasting durability. Featuring a water-saving silicone seal and kink-free chain, it fits most toilets with 3-inch flush valves and comes backed by a 10-year warranty, making it the trusted choice for efficient, reliable toilet performance.



| Brand | Fluidmaster |
| Exterior Finish | Red |
| Inlet Connection Size | 3 Inches |
| Inlet Connection Type | 3-inch flush valve |
| Item dimensions L x W x H | 5.25 x 9 x 3.25 inches |
| Material | Rubber |
V**G
Easy to install, looks good, works perfectly.
This toilet flapper valve is easy to install and works perfectly. I can't recommend it enough. You won't be disappointed.
I**S
Works well, easy install
Works well, easy install
B**E
Quick swap out!
Replaced in a Builders grade Gerber toilet. Two min. Swap out no adjustments needed but the chain.
D**N
Seems great but didn't fit universally
This was not universal in terms of latching. I’m. Ot sure if that was my fault, so I’ll settle on saying it seems like it will work great if you know how to use it and just know toilets apparently vary in stupid ways. So double check. Honestly I think this taught be it was not the flapper causing the running, but it was a solid try from an uninformed person taking the term universal as I think we generally would. I didn’t even know there was a difference in the flapper connection vs the size of the plug. That I really thought was universal. I accept my failure and momentary defeat lol Not going to return this, because it works fine and seems great quality. I only give 4 stars due to the marketing of universal not seemingly being 100 percent accurate and that was why I ordered a more expensive version of other cheaper ones.
R**R
Perfect fit
This worked perfect in my Project Source toilet.
T**R
Measure to make sure you are ordering what you need and you’ll be fine
Works like it’s supposed to, but I must let you know, I measured for the part I needed. I always question reviews from people who say a part doesn’t fit. I wonder, did they measure? Don’t take 5 minutes to rate something low because you didn’t take a minute to measure! It was simple to install, took all of a few minutes from start to finish, including draining the tank. I’ve had absolutely no issues with leakage since installing the Fluidmaster. It’s been installed about a month now.
A**R
fluidmaster 540 replacement
package arrived open, not sure why but it could have definitely happened in shipping, I installed it and adjusted the chain and it seems to be working perfectly, if you have a fluidmaster 540 3 inch these will be a good replacement if needed, the quality of the flapper seems to be pretty good
V**A
😑
Purchased in July 2024 and now I need to replace it again. Do with what you will
Trustpilot
2 weeks ago
1 week ago