Fluidmaster 3" 5403 Universal Toilet Flapper

“Kohler K-GP1039444 Class 5 Toilet Flapper for One Piece Toilet” has been added to your cart. View cart

Red plastic flapper with black rubber seal and stainless chain.

Fluidmaster 3" 5403 Universal Toilet Flapper - Image 2

WHAT OUR CUSTOMERS SAY…

“This place is amazing. I live in San Antonio, Texas and there are a few plumbing stores with vintage parts but they never have what I need and the ordering process takes them weeks. I found a rare part at Noels by reverse image search but they will do it for you. I've used them 3 times. Their agents are knowledgable and polite. They will find you the same part or the after market part and get you going on your way. They have 2-3 day shipping. My house was built in the 30's and they know exactly what the after market parts are that I need. I save money and time going to them. I sure wish they were in San Antonio! I will just go directly to Noel's next time - they are LEGENDS! ”

-BP W.

06/21/2026

$24.17

Stop your running toilet instantly and cut down on water bills with the Fluidmaster 5403 Universal 3-Inch Toilet Flapper. This high-performance plumbing replacement part is engineered to eliminate ghost flushing, leaks, and noisy tank fills in newer, high-efficiency toilets. Built with a heavy-duty solid frame and an adjustable water-saving dial, this 3-inch flapper optimizes your toilet’s flush volume while providing a leak-free seal that stands up to hard water.

We can ship anywhere the US Postal Service ships. For orders being shipped outside the US, please contact us at (888) ASK-NOEL, asknoel@noelsplumbingsupply.com, or via the text widget on this screen.

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The Fluidmaster 5403 is a universal adjustable 3-inch toilet flapper designed to stop running, leaking, or “ghost flushing” toilets. It is engineered for modern, high-efficiency toilets (1.28 to 1.6 gallons per flush) manufactured after 1994.

5403

Stop a running toilet and optimize your flush with the 5403 Water-Saving Flapper
Universal – Fits most 3” flush valves
Fits American Standard®, Kohler® Cimmaron, Toto® and other toilets
Easy to install
Adjustable dial for flush performance and water savings
Long lasting silicone seal
Chlorine and hard water resistant**
Solid frame for the best seal- no twisting
10 year warranty