If the flapper is more than 5 years old, simply change it. A worn out flapper is easy to replace, and the replacement flapper is inexpensive. The reason for the leaking may just be the flapper being a bit loose. Inspecting the flapper. The water from the tank is slowly leaking into the bowl, and I can’t figure out why. Because water had been leaking from tank to bowl, I replaced the flapper, using the Korky "Universal Flapper" (2023 BP). If the edges of the flapper start to crack or wear, the flapper won't seal properly when it seats back down on the flush opening. 3. just installed a toto aquis toilet. Because these flappers are constantly exposed to the water inside the toilet tank, they can eventually begin to wear out. Toto Toilets. If the toilet still leaks after performing these toilet flapper troubleshooting tips, contact a professional plumber at Sobieski Services, Inc. for more help. In some cases, you might need to replace parts for the toilet to function well. Old Toto toilet flappers, for instance, typically last four to five years due to wear and tear. The trip handle is on the left side (facing) of the toilet and it pulls the flapper to the front of the toilet. 1- Worn flush valve flapper. These can go bad after years of service and requiring replacement. However, some flappers might have a shorter lifespan depending on the pH level of the water or use of chemicals in cleaning the toilet. They have redefined the domestic gravity flush toilet design with their new systems on a regular basis. (in wall tank) toilet leaks water at what would normally be the flapper,it slowly leaks the tank down until it has to fill … The ball or flapper is supposed to form a watertight seal. The time saved will outweigh the cost of fussing with an aged flapper. After a period of time this part can begin to deteriorate or become defective. If the flapper is less than 5 years old, check the rubber surface for debris. The spacers are nothing more than two pieces of plastic tubing about 3/16" long. The 5051 flapper is for a toilet manufactured after 1994. At the bottom of a toilet tank is the flapper, or flush valve ball. Fit the new flapper in place, reattach the chain, turn the water back on and test the replacement. I called Toto, explained the problem, and they sent me a replacement flapper(THU331S to replace the THU175S) and also spacers. One of the common causes of a leaking toilet is a bad flapper on the flush valve. When this occurs, water begins to leak around it into the toilet bowl. If you have a Toto Toilet fill valve, this article will guide you on how to fix it. Toilets can leak or flush poorly when the chain connecting the flapper to the flush handle is too short or too long. Toilet leak usually caused by flapper or flush valve assembly Q: My toilet is causing me fits. These can corrode the flush valve and its components causing your toilet not to function properly. 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