SmarterFlush Dual Flush Retrofit Kit

Dual Flush Retrofit Kits transform existing two-piece, 1.6-gallon toilets
with a two-inch discharge into dual flush toilets. Once retrofitted, the
toilet gives the user the ability to choose a full flush option for solid
waster or a lesser volume for liquids and paper. Not only do they save
water, but they avoid the landfill costs and carbon footprint associated
with the construction of the new toilet, distribution of a new toilet, as
well as the disposal of the existing toilet.