American Standard 7381129-200.0070A Universal Flapper and Chain with Float for 2-Inch Flush Valves , Black

Hate to say how I feared tackling the toilet repair. Thankfully, Amazon reviewers and eHow.com to the rescue. First, I learned the parts are more or less driven by the tank number and the gallons per flush, carved into the inside of the toilet tank. Then I did a little research on the American Standard site, which had some good troubleshooting scenarios and some diagrams with labels. From that I determined I needed either a new flapper, a new flush valve, or a new fill valve. But it seemed to me that when I pressed down on the flapper, the running water stopped. Best advice from American Standard, water inside the tank is perfectly clean. That's good because I spent a lot of time with my arms in that tank. It was a little confusing to diagnose because the water fill was running too, but stopped when I pressed down on the flapper, so I figure it had to keep filling when the flapper was leaking.The flapper did solve my problem. I had never known that the yellow "float" is the piece that controls the amount of water that moves from the tank to the bowl on the flush. As others have said, the shorter the distance between the yellow float and the black flapper, the more water coming thru. I used to have to hold the handle down to get sufficient water thru, but no more. For my 4072, I have 7 beads or less distance between the yellow float and the black flapper. I have about 35 to 38 beads between the yellow float and the trip lever, that is, I had to shorten the distance between the hook and the yellow float by some beads, to get the right tension in the lever. I'm writing these down because I have four 4072 toilets in this house.A little about the flapper. If you stick your hands into the tank and feel it, you will feel that it is somewhat flexible at the place where it attaches to the post, and kind of just fits right over a little protrusion on both sides. You can pretty gently work it off and on and if you are having to experiment with the beads, as I did, you will get pretty good at removing it and replacing it. I finally had the brainstorm to go up and look at my other toilet to see what its beads were set at, and that was helpful. Would have probably been good to know that first. I didn't know what I didn't know.I did not turn off the water to replace this flapper. Just fyi for those who have fear of shut-off valves.

I have 2 19-year old American Standard toilets that came with my house. They both started leaking around the same time. I decided to stick to the same brand versus the generic brands. They looked almost identical to the original that were on my toilet. They worked - no more leaks! The hope is that they would also last a long time.Easy to install also. I turned off the water on the bottom of the toilet, flushed the toilet to empty the tank, remove the old part (no tools required), replaced with the new - the same exact way as the original. Turned the water back on and flushed twice to test. No more gushy, leaky toilets.

After finding out the hard way that the "universal fit" doesn't work in my toilet this is an exact match to the American Standard model I have. Works perfectly.

Fit perfect

I just bought a condo and the toilet would run every so often. I had two people fiddle with things in the tank - my dad was really quite sure he fixed it - but it was still running. I replaced the flapper with this (and it was clearly an already replaced part, with a different brand name on it, and no float) last night. It was fairly easy - the biggest difficulty was getting the old flapper off. It did not have the soft little wings like this one but they were hard and they clipped on, sort of. Second biggest difficulty, getting the chain set just right. It wasn't a perfect comparison to the old one as that one had no float. I set the float on the level the chart recommended but the length of chain above that had to be fiddled. Then, it seemed like it was taking longer to fill the tank (perhaps a "watched pot" effect) and, the handle would need a jiggle to get the flapper to settle correctly so the tank would fill at all. I was a little concerned about this, but by this morning, everything was flushing easily and filling just fine. I have seen other reviews mention that it took a few flushes for the flapper to really settle into the seal, perhaps that's it? This is a lot of detail but I think it's good to know, if it doesn't seem quite right at first give it some time before trying something else.It was a little difficult to figure out what part I needed as the previous owner saved info on everything in the bathroom, including the towel bar, EXCEPT the toilet. Luckily he had saved a brochure about the whole line that included the toilet. This seemed to be the part although it was again a little complicated to make sure the part # in the chart on the back was correct as I only had the tank #, not the #s for the parts within the tank. A little Googling got me sorted.