The HYR451T combines two products that will increase your toilet's efficiency and save water and money. No leaky flapper, tangled chain or handle that has to be jiggled. The total repair dual flush valve quickly and easily converts most standard 2-piece toilets 1.6 GPF and higher into a two-handle, dual flush toilet. It works with standard 2 in flush toilets. The short center lever is the Quick Flush setting that uses significantly lower water volumes for liquids and paper, the setting needed 4 out of 5 times.