Fluidmaster F502P21 PerforMAX Universal Water-Saving Long Life Toilet Flapper for 2-Inch Flush Valves, Adjustable Solid Frame Design, Easy Install, Red, 1 Pack

Perfect replacement. If you're looking at this I imagine you know what it is. The old one had become hard over time and so didn't form a good seal. As a result there was a constant leak from cistern into toilet bowl. This in turn meant a fill up every 10 minutes or so which irritated me and was also a waste of water. Replaced it in about 30 seconds - not fiddly at all and works great. Lets see how long this one lasts. If it's less than 2 years I'll come back and knock a star off.

Perfect replacement for my existing one.

Fairly expensive for what it is, but is easy to fit and the part it replaced had lasted over 5 years.

I recently found that there was a constant trickle of water from the toilet cistern into the pan. The cistern has a Fluid Master flapper valve that I fitted in 2011 and I noticed that when it was in the shut position it wasn't forming a water tight seal any more. After lots of fiddling about and no success (in fact, I ended up making things worse so that the trickle became a proper flow!), I discovered through blogs that the flapper mechanism often become distorted after typically 5 years of use and need to be replaced. There's no need to replace the whole flush mechanism, just the red valve. I ordered a replacement flapper valve and installed it within 10 minutes (the bit that took longest was fiddling to get the chain to the right length). Note that Fluid Master produces 3 variants of the flapper valve - the one I needed was a 502, so should you need to replace yours please just check that yours looks the same as this one; if not, it could be a 501 or 504 variant.

I changed my toilets to use these flapper style flushers about 7 years ago. They are better than siphon systems because they are simpler, easier to adjust the flush rate and should last longer. However, they had both started leaking because the rubber had gone solid and wasn't making a good seal. These take 2 minutes to replace (really) and are lovely soft rubber again but also are a bit wider so they more fully cover the hole underneath rather than trying to fit into it exactly. Work perfectly.

As above, I still wait for the second unit which I don't think will arrive now. The unit is very good, fits our cistern with ease and furthermore, works very well. Delivered 2 Jul 2020 (One Item only) Fluidmaster 502P21 Adjust-A-Flush, Red, 2 in £16.56 Buy it again View your item

Delivery a bit slow, but item does the job well ,and good quality as well

bought to replace one that lasted about 3 months - broke at chain connection - definite weak spot. . so three stars for design

It is exactly as depicted. The plastic is fairly thick for what it is, so considering its placement I think it will last a very very long time. The one we had prior was entirely made of rubber and it had sagged and torn over time, leaving an endless flow of water that racked up an extra $50/m on our city bill. Putting this on was SUPER easy, I am a woman (and certainly not a plumber) and I had no problem clicking it into place or attaching the chain to the lever. I love the price, very fair. As mentioned, the top cap is plastic, but I find that beneficial. Firstly, it will not sag as the old one did. Secondly, it makes movement easy, as its quick to lift and quick to drop. Mind you this toilet is in my young children's room, so they need something that doesnt require excess effort to flush. Highly recommend.

Le quedo muy bien al tanque de agua . No hemos tenido problemas , fácil instalación

I recently purchased the Fluidmaster 502P21 PerforMAX Toilet Flapper to fix a constantly running toilet, and I couldn’t be happier with the results. Installation was a breeze — I had it swapped out and working in under 10 minutes without any tools or plumbing experience. The instructions were clear, and the solid frame design made it easy to align and secure in place. One of the best features is the adjustable dial, which allowed me to fine-tune the flush rate for better water efficiency. After making a few quick adjustments, I noticed an immediate reduction in water usage without sacrificing flushing performance. It's a great water-saving solution that’s both affordable and effective. The build quality is impressive too. The flapper feels durable and well-made, with a strong seal that eliminated the leaks I was dealing with. Plus, it fits standard 2-inch flush valves, so it’s truly universal for most toilets. Overall, the Fluidmaster 502P21 is a small investment that delivers big results. If you're dealing with a leaky or inefficient toilet, this is a simple, reliable upgrade that can save water and money. Highly recommended!

I bought this because one of our toilets would randomly keep running and it was driving me insane. I kept jiggling the handle, adjusting things inside the tank, and trying temporary fixes until I finally decided to just replace the flapper. Problem solved immediately. Installation was straightforward and only took a few minutes. Once installed, the toilet stopped constantly running and has been working normally ever since. Sometimes it’s amazing how such a small inexpensive part can completely fix an issue that’s wasting water and becoming annoying every single day. The material feels much better than some of the cheap generic flappers I’ve used in the past and it created a solid seal right away without needing a bunch of tweaking or adjustment. Honestly, if your toilet keeps randomly running or cycling on and off, there’s a good chance your flapper is the issue and this was an easy inexpensive fix that worked perfectly for me.

More expensive than a basic flapper valve but being adjustable for flush volume is a plus. And the valve shuts with a real snap at the right volume. Installation is easy - just be sure about the chain length.