Plumbcraft Toilet Flush Valve and Flapper - 3", Fits Most Toilet Tanks With 3-Inch Flush Drains FOR 3-INCH TOILET DRAINS: Replaces worn 3-Inch Flush Valves. Includes flapper. STRONG SEAL: Ultra strong seal provides leak free operation saving water and money FITS MOST TOILETS WITH 3-INCH DRAINS: Including American Standard, Glacier Bay, and Mansfield EASY INSTALLATION: Easy to install, includes detailed instructions RELIABLE: The Plumbcraft toilet repair brand that has been around for over 50 years.