---
product_id: 4586608
title: "Fluidmaster 504 2-Inch Universal Chlorine Resistant, Long Lasting Flexible Frame Toilet Flapper , Red"
brand: "fluidmaster"
price: "HK$148"
currency: HKD
in_stock: false
reviews_count: 8
url: https://www.desertcart.hk/products/4586608-fluidmaster-504-2-inch-universal-chlorine-resistant-long-lasting-flexible
store_origin: HK
region: Hong Kong
---

# 5-year durability warranty 2-inch universal fit Chlorine & hard water resistant Fluidmaster 504 2-Inch Universal Chlorine Resistant, Long Lasting Flexible Frame Toilet Flapper , Red

**Brand:** fluidmaster
**Price:** HK$148
**Availability:** ❌ Out of Stock

## Summary

> 🚽 Upgrade your flush game with the ultimate universal flapper!

## Quick Answers

- **What is this?** Fluidmaster 504 2-Inch Universal Chlorine Resistant, Long Lasting Flexible Frame Toilet Flapper , Red by fluidmaster
- **How much does it cost?** HK$148 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/4586608-fluidmaster-504-2-inch-universal-chlorine-resistant-long-lasting-flexible)

## Best For

- fluidmaster enthusiasts

## Why This Product

- Trusted fluidmaster brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted Durability:** Backed by a 5-year warranty for peace of mind and reliable function
- • **Kink-Free Metal Chain:** Strong, tangle-resistant chain guarantees smooth flushing every time
- • **Effortless Installation:** No need to shut off water—easy DIY swap saves time and hassle
- • **Universal Compatibility:** Fits most toilets including American Standard actuators for 3.5+ GPF models
- • **Chlorine-Resistant Longevity:** Microban protection ensures long-lasting performance against harsh water conditions

## Overview

The Fluidmaster 504 is a 2-inch universal toilet flapper designed for 3.5 gallons per flush or larger toilets, including American Standard models. Featuring chlorine and hard water resistance with Microban protection, it offers long-lasting durability backed by a 5-year warranty. Its flexible frame and kink-free metal chain ensure smooth, reliable flushing, while the easy installation requires no water shutoff—perfect for upgrading older toilets effortlessly.

## Description

Product Description Fluidmaster 504 2-Inch Universal Chlorine Resistant, Long Lasting Flexible Frame Toilet Flapper , Red From the Manufacturer 504 Universal Long Life Toilet Flapper. Pre-1994 Full Flush flapper. Universal design fits most toilets, including American Standard actuator units.

Review: Easy peasy - I didn't even shut the water off! - Just follow the directions on back. I didn't even shut the water off. I brought some stainless wire wool to clean dishes and a scissors and set them on the counter. I opened the flapper valve package and set it on the counter. I flushed the toilet and while the water was running out I scrubbed the seat that the water was going through with the stainless steel wire wool for pots and pans. The flushing of the tank cleaned it all out. I just removed the old one by pulling it off of the 'ears' sticking out of the standpipe with one hand while holding up the float with the other. I checked the new one for size and fit (the long droopy side with the hole in it goes down). Then I held the float and flapper valve in the same hand and with the other hand cut the center doodads out with two snips of the scissors being careful not to drop the cutout into the flush hole. You'll figure it out. The directions on the package back and the float valve both indicate where to cut. I did two cuts where the float valve said 'cut' and then slipped the rubber arms of the float valve over the standpipe ears with one hand while still holding the float up with the other. Remember the oblong part with the hole goes down. I flipped the float valve up and down a couple of times to make sure it was seating roughly close and to ensure it wasn't binding. Then I used the old float valve next to the new float valve and checked the chain length. With the new float over the flush hole, I let go of the float and allowed the tank to fill while I adjusted the new chain length and clipped it next to the old float valve chain attachment being careful not to yank and flush the toilet. It wouldn't matter if it did - I just didn't want to waste more water. Done. And it works like a jewell.
Review: Very good flapper for older toilets ! - This is a great flapper for an older toilet ! My toilet in my basement is from the 1970's and was running from time to time . I installed this Fluidmaster flapper and problem solved no more running toilet . Was very easy to install too,I didn't even have to turn the water off ! I highly recommend this flapper if you have an older toilet . It says right on the package before 1994 !

## Features

- Universal design fits most toilets, including American Standard actuator units – for 3.5 gallons per flush toilets or larger
- Fits on flush valves with or without mounting ears
- Chlorine-resistant with Microban protection
- Strong, kink-free metal chain
- 5-year warranty
- Pre-1994 Full Flush flapper
- Note: This product is designed to fit toilets with 2″ flush valves
- Chlorine and hard water resistant
- Universal design fits most toilets, including American Standard actuator units
- Five year warranty

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Fluidmaster |
| Color | Red |
| Item Weight | 9.07 g |
| Material | Plastic |
| Outside Diameter | 2 Inches |
| Product Dimensions | 7.5"L x 4.25"W |

## Product Details

- **Brand:** Fluidmaster
- **Material:** Plastic
- **Color:** Red
- **Product Dimensions:** 7.5"L x 4.25"W
- **Item Weight:** 0.02 Pounds
- **Outside Diameter:** 2 Inches
- **Item Length:** 1.75 Inches
- **UPC:** 039961005045
- **Manufacturer:** Fluidmaster
- **Global Trade Identification Number:** 00039961005045

## Images

![Fluidmaster 504 2-Inch Universal Chlorine Resistant, Long Lasting Flexible Frame Toilet Flapper , Red - Image 1](https://m.media-amazon.com/images/I/61j4ZQRLHqL.jpg)
![Fluidmaster 504 2-Inch Universal Chlorine Resistant, Long Lasting Flexible Frame Toilet Flapper , Red - Image 2](https://m.media-amazon.com/images/I/71TYdscI7cL.jpg)
![Fluidmaster 504 2-Inch Universal Chlorine Resistant, Long Lasting Flexible Frame Toilet Flapper , Red - Image 3](https://m.media-amazon.com/images/I/61ajGvaxBZL.jpg)
![Fluidmaster 504 2-Inch Universal Chlorine Resistant, Long Lasting Flexible Frame Toilet Flapper , Red - Image 4](https://m.media-amazon.com/images/I/713Nvx7aYRL.jpg)
![Fluidmaster 504 2-Inch Universal Chlorine Resistant, Long Lasting Flexible Frame Toilet Flapper , Red - Image 5](https://m.media-amazon.com/images/I/81SIe-985ZL.jpg)

## Questions & Answers

**Q: what are the dimensions of this item**
A: All of these are pretty standard in size. This is made so that it will fit at least two different sizes. The way it came, it didn't fit, but I used scissors as instructed to cut one little piece off of it, and it fit perfectly, snapped right into place and worked like a dream. The whole thing (including going and finding a pair of scissors) took less than 5 minutes. That includes reading the instructions, too. Unless your toilet was made in another country, I'd guess there's a 99% chance that this will either fit perfectly as-is, or with a small cut with scissors, will fit perfectly. Pay attention to where the chain from the lever is fastened so you can fasten it back in the same place.

**Q: Has anybody used this flapper successfully in modern (1.6 gpf) toilets, or will it only work in old 3.5 gpf toilets?**
A: You could try it in a 1.6 GPF toilet...But it works best for 3.5 GPF toilets made before 1994. Fluidmaster  labels it as being a universal flapper. That's all I know about it. Other than it has a 5 year warranty.

**Q: I release the toilet lever it goes straight to the bottom which means that the tank doesn't fully empty.  Its predecessor floated.  What's wrong?**
A: Some flapper just do this.. I just hold the toilet flushing handle down a few minutes to be sure it is fully empty.

**Q: The fluidmaster 504 is the form I need because the toilet is old and does not have mounting ears but is it made out of rubber or plastic?**
A: Thank you for your question concerning our flapper model 504.  The flapper is an all rubber model.  For additional questions on any Fluidmaster product contact us at your earliest convenience. Fluidmaster’s Technical Service Department is available Monday through Friday from 5:30 AM through 5:00 PM Pacific Standard Time. Contact options include: Chat www.fluidmaster.com/support E-Mail techsupport@fluidmaster.com and Toll Free 800-631-2011.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Easy peasy - I didn't even shut the water off!
*by P***R on June 25, 2023*

Just follow the directions on back. I didn't even shut the water off. I brought some stainless wire wool to clean dishes and a scissors and set them on the counter. I opened the flapper valve package and set it on the counter. I flushed the toilet and while the water was running out I scrubbed the seat that the water was going through with the stainless steel wire wool for pots and pans. The flushing of the tank cleaned it all out. I just removed the old one by pulling it off of the 'ears' sticking out of the standpipe with one hand while holding up the float with the other. I checked the new one for size and fit (the long droopy side with the hole in it goes down). Then I held the float and flapper valve in the same hand and with the other hand cut the center doodads out with two snips of the scissors being careful not to drop the cutout into the flush hole. You'll figure it out. The directions on the package back and the float valve both indicate where to cut. I did two cuts where the float valve said 'cut' and then slipped the rubber arms of the float valve over the standpipe ears with one hand while still holding the float up with the other. Remember the oblong part with the hole goes down. I flipped the float valve up and down a couple of times to make sure it was seating roughly close and to ensure it wasn't binding. Then I used the old float valve next to the new float valve and checked the chain length. With the new float over the flush hole, I let go of the float and allowed the tank to fill while I adjusted the new chain length and clipped it next to the old float valve chain attachment being careful not to yank and flush the toilet. It wouldn't matter if it did - I just didn't want to waste more water. Done. And it works like a jewell.

### ⭐⭐⭐⭐⭐ Very good flapper for older toilets !
*by A***R on May 1, 2025*

This is a great flapper for an older toilet ! My toilet in my basement is from the 1970's and was running from time to time . I installed this Fluidmaster flapper and problem solved no more running toilet . Was very easy to install too,I didn't even have to turn the water off ! I highly recommend this flapper if you have an older toilet . It says right on the package before 1994 !

### ⭐⭐⭐⭐⭐ Couldn't be any easier to install
*by C***L on March 20, 2013*

The plumber wanted $50 to come out and take a look at why our toilet kept running. Since toilets are pretty darned simple mechanisms, I took the lid off the tank and immediately spotted the problem: the flapper hinges had DISINTEGRATED. I placed the plug back into the hole & ordered this inexpensive replacement from Amazon. With much love to Amazon Prime, this flapper arrived THE NEXT MORNING! The flapper comes packaged nicely with instructions. Our toilet didn't need the ring/hinge portion of the flapper, so following the instructions, I carefully snipped that part off with a pair of regular scissors at the line marked "SNIP". Lo and behold, there was my disintegrated flapper's TWIN! I turned off the water supply to my toilet and took the tank lid off. Flushed the toilet to drain the tank. Removed the old, funky, disintegrated flapper and threw it away, SAVING THE CHAIN. Installed the new flapper by fitting the holes on the hinge to the hinge arms sticking out on either side of the long tube thingy. I then made the chain on the new flapper the exact same length as the old chain. (This saves you from having to figure out the best length for the chain that leads to the toilet lever, which lifts up the flapper to let the water drain out.) Hooked the chain to the toilet handle. Turned the water supply to the toilet back on. Flushed the toilet. LO AND BEHOLD! The flapper worked like a champion! VICTORY DANCE! I used the money I saved not calling the plumber to go out for a victory dinner. :) Seriously great quality flapper for very little money. You can do it too!

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-03-03*