550DFR Fluidmaster Duo Flush Valve Water conservation is becoming a bigger and bigger issue all the time. 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” 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 systemUses up to 45% less waterDurable silicone seal lasts for yearsFully adjustable full and half flushRetrofits to any 2" toilet10-year warrantyConverts your existing toilet to Dual Flush TechnologyAutomatically saves waterDelivers precise and powerful flushing actionFully adjustable for a wide range of settings