The time saved will outweigh the cost of fussing with an aged flapper. Because water had been leaking from tank to bowl, I replaced the flapper, using the Korky "Universal Flapper" (2023 BP). A worn out flapper is easy to replace, and the replacement flapper is inexpensive. (in wall tank) toilet leaks water at what would normally be the flapper,it slowly leaks the tank down until it has to fill … If the toilet still leaks after performing these toilet flapper troubleshooting tips, contact a professional plumber at Sobieski Services, Inc. for more help. The spacers are nothing more than two pieces of plastic tubing about 3/16" long. In some cases, you might need to replace parts for the toilet to function well. The 5051 flapper is for a toilet manufactured after 1994. 1- Worn flush valve flapper. NOTE: Never place any cleaning tablets in the water tank of your toilet. 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. Inspecting the flapper. When this occurs, water begins to leak around it into the toilet bowl. If the flapper is less than 5 years old, check the rubber surface for debris. Toilets can leak or flush poorly when the chain connecting the flapper to the flush handle is too short or too long. Toto Toilets have been available in the market since 1985. The reason for the leaking may just be the flapper being a bit loose. Toto Toilets. One of the common causes of a leaking toilet is a bad flapper on the flush valve. If the flapper is more than 5 years old, simply change it. These can go bad after years of service and requiring replacement. 3. If you have a Toto Toilet fill valve, this article will guide you on how to fix it. However, some flappers might have a shorter lifespan depending on the pH level of the water or use of chemicals in cleaning the toilet. The water from the tank is slowly leaking into the bowl, and I can’t figure out why. These can corrode the flush valve and its components causing your toilet not to function properly. I have a Toto Drake II (ST454E) from 2011. I called Toto, explained the problem, and they sent me a replacement flapper(THU331S to replace the THU175S) and also spacers. After a period of time this part can begin to deteriorate or become defective. 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. Take the old flapper to the hardware store to ensure you pick a correct replacement. Old Toto toilet flappers, for instance, typically last four to five years due to wear and tear. The ball or flapper is supposed to form a watertight seal. The flapper itself, which is usually made of rubber, can leak, causing the toilet to run. 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