Since 1997, HomeTips has guided millions of homeowners with original, expert advice for DIY home improvement and repair. Founder Don Vandervort, a nationally recognized authority, has written more than 30 books and countless magazine articles, been a host on HGTV, and served as MSN's home improvement expert. MORE
A toilet won’t flush fully if the rubber flapper in the toilet tank closes too quickly. Make sure the flapper is hinged properly on the overflow tube. Then look to see if the flapper has an adjustment—if it does, make sure it’s set up properly.
Check the chain’s length—pull it tight and then back it off one link and reattach it.
Flappers, available in hardware stores and home improvement centers, are very inexpensive to buy. If the above remedies don’t work, replace the flapper with a new one.
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A toilet won’t flush fully if the rubber flapper in the toilet tank closes too quickly. Make sure the flapper is hinged properly on the overflow tube. Then look to see if the flapper has an adjustment—if it does, make sure it’s set up properly.