American Standard033643-0070A Seat Disc Black, 3/4 in x 3 in, 1 Count (Pack of 1)

OK, it is just a rubber disk but it solved my leaking American Standard old style one piece! I had bought three different whole valves --each with rubber disks that LOOKED like this but they all leaked, some a little, some a lot. I bought the red ones at the big box "HD" store. They leaked too. After a frustrating week of sealants and repeated swapping of parts I bought this one. This was apparently an OEM item made by or for American Standard and it just snapped on and worked PERFECTLY. Five Stars!Later addition: A year later I had the same problem again with another of the three American Standard model 4s in my old house. This time I knew not to go to the big store and I ordered the same again one on Amazon. Yikes! It didn't work this time.Since it was the same "OEM" replacement that had worked last time I was sure it had to be another problem, maybe the seal underneath the bronze base? So I took everything apart and added a good seal of plumber's putty between the base and the porcelain. Nope. STILL didn't work; toilet refilled every 15 minutes or so. Carefully observing the new flapper and the old pivot it appeared that the edge of the rubber disk touched the pivot just enough to push it slightly off center. I thought of just clipping one edge, but since the disk can turn, i figured I'd get the same problem again if it turned a bit. So I took kitchen shears and trimmed about a sixteenth or an eighth inch all around. VOILA!!! It worked instantly. Whether it is no longer touching the pivot mount or by snipping away some of the circumferential stiffening I made it more flexible, in any case it makes a great seal now.Whew. I had almost gotten to the point of buying a new toilet.

I noticed water coming slowly down the inside wall of the toilet. A leak like this can really raise your water bill, so I took off the tank cover and investigated. What i found was that rubber seal had hardened and needed to be replaced. To replace, I turned off the water to the tank, look for small valve under or behind tank. Once the water was turned off, then to replace seal, you gently pull off the old one (its a ball like joint), and replace it with the new one. Very straightforward, then turn on the water to insure everything is working, if everything is good, put cover back on. This is an excellent replacement..

On the advice of helpful forum and review posts, I decided to replace the disc with a new one hoping to stop a slow leak. The previous disc was less than 5yrs old and was an American Standard branded one. When I inspected it, it looked like what a 5yr old disc would look like, but didn't seem to be compromised in any way. I changed it thinking that if it didn't fix the problem, I would probably end up changing it out at some point anyways. To my surprise, just replacing this part with a new one solved my problem. Apparently as these discs age, the seal they form starts to deteriorate and leads to leaks. Anyways, it's worth a shot given it is low cost and may fix your problem too.

Packaging is generic, "made in Mexico" which is totally fine...and seems of good quality soft rubber; does not "snap" into place on shaft the way my original does. Nonetheless, the price is right, the toilet is not leaking/running anymore and it's a good value. Quality seems there, just not OEM.

This is the one you need. This is the actual American Standard OEM part. Soft, flexible rubber that seals perfectly. The exact right weight too to flip up properly and easily and not come down too early. Easily pops onto the actuator that the old one had been on. This is the “snap on” one.I had tried the ones made for this toilet by other manufacturers since that’s what they had in stock at the hardware store, but those other ones never worked quite right and failed soon (the other ones rubber got hard and started cracking).This one works great and I only regret not having bought the one made by American Standard off of Amazon sooner. I used this on a 1967 Cadet but this works on pretty much any American Standard toilet with the tilting actuator that allows you to “snap off” the old seat disc and snap on this one. No tools required.

I was a little reluctant to buy a toilet flapper outside of a store or using a plumber’s advice. This worked perfectly, and my ghost flushing toilet has stopped flushing intermittently throughout the day. Thank you for offering this on Amazon.

Was extremely easy to remove old one and press in the new one. Perfect fit, American Standard toilet.

Great replacement for an older American standard toilet, easy off, easy onTakes a day or two to seat

This seat disc fits well on my American Standard toilet. American Standard designed this part to enable anyone to change the part in just a matter of minutes so don't buy any imitations. And there's no need to call a plumber because anyone can install this very easily. I bought this from Amazon and they provide the product as described with reasonable price and I got this product by the anticipated date. Excellent product, excellent service.

Perfect fit and easy to install

As others mentioned, I got a slightly different looking product from what the photo shows, but it works fine. The dimensions aren't clear in the description but this works great on my American Standard toilet with a two inch opening. It snaps on and works instantly.

The Seat Disc is same as the original one for American Standard toilet, and diameter is 3" (7.6cm).Easy to install it but a little bit difficut to remove the original seet disc as there are lots of impurities inside the hole.Make sure to use plastic disposable gloves to do this job.

Good fit to my American Standard toilet bowl. The slow leak is gone.