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Fluidmaster

Fluidmaster 5403 Universal 3-Inch Toilet Flapper, Water Saving

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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Oct 12
Order within 5 hours and 35 minutes
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Size: 3 Inch


Style: Toilet Flapper


Features

  • LONG-LASTING DURABILITY: Toilet flapper with solid frame and kink-free chain replaces leaky, corroded flappers, preventing twisting, ghost flushing, and running toilet problems
  • UNIVERSAL DESIGN: Adjustable flapper fits most 3-inch flush valve toilets, best for use in high efficiency 1.28 to 1.6 gallons per flush toilets, includes adjustable length kink-free chain
  • ADJUSTABLE TO SAVE WATER: Dial flapper adjusts for maximum flush efficiency and to save water
  • SILICONE SEAL: Durable silicone seal lasts 10X longer than regular flappers and resists chlorine and hard water
  • 10-YEAR WARRANTY: This product has a 10-year warranty; Note: this item is not designed to fit 2 inch flush valve toilets

Description

Fluidmaster 5403 3-Inch Universal Water Saving Long Life Toilet Flapper From the Manufacturer Fluidmaster is the 1 toilet repair brand in the world. Since 1957, we have been guiding our customers to the right toilet repair solutions. Fluidmaster is dedicated to making the installation of its products easy and simple with a complete line of toilet repair parts including: fill valves, single and dual flush valves, flappers, tank levers, toilet seals (bowl wax and wax-free), toilet repair kits, flush valve seals, connectors and more. Fluidmaster parts are found in more toilets than all other brands combined. Fluidmaster distributes to over 90 countries and is the trusted brand by toilet manufacturers and professionals worldwide.

Material: Rubber


Brand: Fluidmaster


Item dimensions L x W x H: 5.25 x 9 x 3.25 inches


Exterior Finish: Red


Inlet Connection Size: 3 inches


Inlet Connection Type: 3-inch flush valve


Outlet Connection Type: 3-inch flush valve


Number of Ports: 2


Outlet Connection Size: 3 inches


Number of Packs: 1


Brand Name: Fluidmaster


Model Number: 5403P4


Number of Packs: 1


Global Trade Identification Number: 33


Unit Count: 1 Count


Item Highlight: Silicone seal lasts up to 10X longer, Adjustable dial saves water, Kink-free chain, Resists chlorine and hard water


Manufacturer: Fluidmaster


Manufacturer Warranty Description: Lifetime


Number of Items: 1


UPC: 039961015433


Included Components: Fluidmaster 5403 3-Inch Universal Water Saving Long Life Toilet Flapper


Item Type Name: Fluidmaster 5403 3-Inch Universal Water Saving Long Life Toilet Flapper


Number of Pieces: 1


Set Name: Toilet Valve Set


Manufacturer Part Number: 5403


Exterior Finish: Red


Inlet Connection Type: 3-inch flush valve


Outlet Connection Type: 3-inch flush valve


Number of Ports: 2


Thread Size: 3 inches


Thread Type: 3 inches


Connector Type: Socket


Valve Type: standard


Item Dimensions: 5.25 x 9 x 3.25 inches


Inlet Connection Size: 3 inches


Outlet Connection Size: 3 inches


Size: 3 Inch


Material Type: Rubber


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Oct 12

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Amazing part - great customer services
Size: 3 Inch Style: Toilet Flapper
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. ... show more
Reviewed in the United States on March 24, 2026 by Chris Walken
    • Toilet Flapper that Fixed the Issue Right Away
Size: 3 Inch Style: Toilet Flapper
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. ... show more
Reviewed in the United States on April 14, 2026 by The Review Desk
    • This was the right size - fixed my running toilet for good
Size: 3 Inch Style: Toilet Flapper
Grabbed this along with a 2-inch flapper to figure out which size my toilet actually needed, since it's not always obvious just by looking. This 3-inch one was the right call - dropped in easily, sealed up right away, and it's been working great ever since with no more running toilet or phantom flushes. If you're not sure which size fits, it might be worth doing what I did and getting both to compare before you commit. ... show more
Reviewed in the United States on September 10, 2026 by Lunchbox
    • Seems great but didn't fit universally
Size: 3 Inch Style: Toilet Flapper
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. ... show more
Reviewed in the United States on July 12, 2025 by Dr. Swanson
    • Fluidmaster 5403 Universal 3-Inch Toilet Flapper
Size: 3 Inch Style: Toilet Flapper
These work well in high chlorine toilets. They are easy to install and offer and adjustable feature to control to amount of flushed water. I used them to replace the original flappers in my Kohler toilets. Replacement is easy and straightforward. They stopped the slow leak I had in my toilet bowls.
Reviewed in the United States on August 3, 2026 by t-bilt
    • A simple item beautifully engineered. So much better than conventional flappers
Size: 3 Inch Style: Toilet Flapper
Review Image by Mr. Picky
Review Image by Mr. Picky
Review Image by Mr. Picky
Review Image by Mr. Picky
Review Image by Mr. Picky
Review Image by Mr. Picky
Review Image by Mr. Picky
Review Image by Mr. Picky
What a great product. The photos explain why you should buy this one. I've also added replacement tips: The first photo shows 3 distinct advantages. 1) a durable silicone rubber seal. The body of the flapper is rigid, durable plastic that maintains the structural integrity of the flapper, but the seal is an advanced, separate, and flexible material that will make an effective leak-proof seal. 2) The width of the hinge is adjustable to fit the posts, which vary by brand, so that the alignment of the flapper is maintained. 3) The volume of the flush is adjustable to conserve water if you choose. 10 settings let you balance water usage and effectiveness. Even the clip that attaches the chain to the flush lever is improved over the traditional dumb clip. The simple addition of an internal barb both secures the clip and keeps it aligned. A table of settings by brand shows the proper volume setting and chain length. The brand of my toilet (Crane) was not listed, so I just set the length to be the same as the previous Toto flapper. Tip: if you have a conventional (non-quarter turn) shut-off valve, don't forget to loosen the packing nut when shutting off the supply, and smugging it up afterwards. It may leak briefly when opening and closing the valve, but failure to adjust the packing may eventually result in a leaky valve. Photo 7 shows the amount of water that was wasted after the complete failure of the Toto flapper before I heard the water leaking. I have a Moen Flo meter on my household water supply. It misclassified the continuous leak as 264 gallons of hose usage; therefore, it did not notify me of the leak. Even though the Flo meter used AI to classify water usage, it did not notify me because of the misclassification. This makes me wonder if, in the event of a washer hose break, it would not detect it. ... show more
Reviewed in the United States on March 21, 2026 by Mr. Picky
    • Poor Quality
Size: 3 Inch Style: Toilet Flapper
Received and chain was in pieces, about a dozen links rattling around in package, had to scavenge chain off old part to make work. Sure wasn't woth $16.
Reviewed in the United States on September 15, 2026 by KK
    • Better than expected - a TRUE water saver
Size: 3 Inch Style: Toilet Flapper
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 ... show more
Reviewed in the United States on April 18, 2026 by KMac

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