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



| ASIN | B000DZF73M |
| Best Sellers Rank | #173,931 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #126 in Toilet Flappers |
| Brand | Fluidmaster |
| Brand Name | Fluidmaster |
| Color | Red |
| Customer Reviews | 4.4 out of 5 stars 3,309 Reviews |
| Global Trade Identification Number | 00039961005045 |
| Included Components | No Other Components Included |
| Item Dimensions D x W x H | 7.5"D x 4.25"W x 1.9"H |
| Item Length | 1.75 inches |
| Item Type Name | Not Available |
| Item Weight | 9.07 g |
| Manufacturer | Fluidmaster |
| Manufacturer Part Number | 504 |
| Manufacturer Warranty Description | 5 year warranty |
| Material | Plastic |
| Material Type | Plastic |
| Model Number | 504 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Product Dimensions | 7.5"D x 4.25"W x 1.9"H |
| UPC | 039961005045 |
| Unit Count | 1 Count |
C**L
Couldn't be any easier to install
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!
A**S
Simple, good quality, good price and instant fix
This flapper went on without a hitch, and the instructions are clear to choose whether you need it around the pipe or attached via the arms on the pipe. Took about 1 minute to put on, replacing a ten-year-old one that was raggedy. Fixed my water leak issue instantly.
A**R
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 !
K**L
BUY 2!!! You will need another one sooner than you think.
PROS: + Fits all the toilets in my house even though they are all different + In expensive on Amazon vs the hardware store + lasts a few years CONS: - The design is poor. The connection of the chain to the flapper is in a bad place and causes the flapper to warp over time. You can reduce the warping if you install it correctly but it will happen eventually. Review: Buy 2 of these! You need one now and you will need another one in about a year or two at 3am when the toilet is running and you can't sleep due to the sound of it going. Buy the spare now and put it under the sink for when you need it. On the design, the chain connects to the flapper on the front edge. When you flush the toilet the chain pulls up on the flap and bends up the front edge of the rubber as it does so. This repeated bending up of the edge eventually warps the rubber flat upward which prevents a tight seal against the tank drain. This will cause a slow leak which will make the toilet run. So far this is how every one of these has failed at my house. What makes it worse is having the chain too tight. You should make sure when you install this that you leave enough slack on the chain that it is not pulling up all the time. The constant upward pull of a tight chain warps the rubber even faster. If you install it correctly you should get a few years of service from it.
P**R
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.
N**R
Leaked initially, but looks like that was my fault
I had used one of these flappers for my downstairs toilet a couple years back, and it worked just fine. When the upstairs toilet needed a new flapper recently, I got another one of these again. The replacement went quickly and seemed okay initially. Unfortunately I found that this one had a slow leak in the seal, and I'd hear the toilet top off the tank periodically. I was thinking I'd need to replace the prior overflow and flush valve to better match the new flapper (and was not looking forward to the steps involved in that), but when I popped the lid off to take another look at it earlier today, I noticed the chain to the flapper seemed almost taut. I detached the chain and attached it again with more slack. No leaking since then! =D My initial estimate of which chain link to use was probably off, and was keeping it from getting a good seal.
S**Y
A little TOO flexible!
Installed this flapper on my 50 year old American Standard toilet and discovered that the unit was a little TOO flexible such that it would not consistently fully seal the tank drain. Specifically, the lateral (side to side) motion of the flapper was such that, after flushing, it would often not seat properly and would leave a very small drain opening either to the right or to the left of the flapper and therefore allow continuous water leakage into the bowl. I replaced this unit with a stiffer (i.e., stiffer 'arms') Corky unit that was similarly priced and haven't had any further issues.
Y**M
Fluidmaster 504 Universal Long Life Toilet
I've lived in my (rented) condo a couple years, and a few months ago one of my toilets was running after I had flushed. I went back in to jiggle the handle, and nothing worked. So I took the top off the tank, and saw that the hard water prior to my moving in and putting a water softener in had eroded away the rubber flapper. I turned the water off at the wall and got on Amazon to see what they had, since i'm too lazy to go to the store. I found this one at a decent price, and had it delivered in a couple days. I was able to cut the rubber part, since I had a different setup in the tank and did not need the ring to slide over. I used the little wings on the side to latch onto the hooks, clipped it onto the arm, and flushed. It was really easy to do, and I was glad for that because i'd much rather deal with something quickly myself than wait for the landlord. So, five stars!
M**A
un buen producto
Una excelente opción para sustituirla válvula de pera de un inodoro antiguo
A**S
Easy to install
Good product. Easy to install and works well
R**J
Good
Working well and solved my issue of water leaking.
D**Y
Works, no more tank leak
My old tank flapper degraded and started to leak. This one came in fast, instructions were super simple and I got it installed in about 10 minutes. My tank takes a 2" flap and this one fit just right, no more leaks!
A**L
Incorrecto pensar que funciona para cualquier WC
No es universal.
Trustpilot
1 month ago
1 month ago