American Standard7381129-200.0070A Universal Flapper and Chain with Float for 2-Inch Flush Valves , Black

Worked fine

My toilet started running water in 10 minute cycles, and when I examined it closely there was a slow leak from the tank to the bowl. When I pressed down hard on the flapper, the leaking sound stopped so I went in search of a replacement flapper. My toilet is an American Standard, but the identifying number in the tank had eroded away, so it was impossible to identify the model and thus impossible to tell which flapper to get. Since the apartments I live in are about 30 years old, I decided to go with this flapper for 2 reasons: (1) the picture looked exactly like the flapper w/ float in my toilet, and (2) some of the reviews said this flapper fit their similarly aged toilets. Got it today, pulled out the old flapper, slid this one on - presto, perfect fit, no more leaking!I'd had to replace a flapper before in the previous apartment I lived in, and it's a pretty easy process, but this flapper was a little bit more difficult than that one because of the beaded chain. The way my damaged one was attached to the tank lever was via the beaded chain, not the hook, so it took a lot of delicate manuvering to pop that sucker out. I was afraid of putting too much force and breaking the lever, so it took a few seconds to do so - but still, a very easy process. I'm not handy at all, I barely know how the toilet works, but this is a very easy process. :)Now, the harder part is finding a replacement for the bleach tablets I put in the tank to keep the toilet clean, as they're undoubtedly the cause of the damage to the original flapper.

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.

Bought this Oct 2023, today I have to get another one since the chain broke today, less that 2 years after purchase. Bottom line is if you need it you need it. Just keep one on hand so you not scrambling for another one.

The instructions are qu. The part is original and work perfectly. I just installed the new flapper and it is an exact match to the one that I removed.