Review on Water-Saving Toilet Flapper Compatible with TOTO Flapper Model THU140S - Long Lasting Rubber Seal, 3-Inch Replacement - Includes Stainless Steel Chain and Hook - Easy Installation (Pack of 1, Blue) by Daniel Jackson

If you have a flow-through toilet, very often it's a flap. But before you buy it, you need to know the model of the toilet. You can find it by lifting the lid over the toilet tank and you will see the model printed inside in black ink. Then get a replacement with the correct model number for your TOTO. The damper's two rubber feet sit on a short plastic rod and are easy to remove, as is the chain attached to the toilet handle extension. A new damper is replaced and the length of the chain adjusted so that it can open and close during flushing.