FLUIDMASTER 507ACP7 Toilet Flush Valve with Flapper, 2 in, 3.5 gpf Flush, For: Most Toilet Tanks

The Fluidmaster duo flush gives you a tool to help save more water than any other dual flush system on the market. The Dual flush system retrofits into any 2 in toilet tank and is proven to use up to 45% less water than the original tank parts. It also has been shown to improve flushing power on the full flush, so you will actually see better performance than before. A dual flush tank lever is included with this system.