~ It was estimated by Fluidmaster in 2006 that there are 250 million toilets installed in private households in America. This does not include public facilities, offices, hotels, stadiums, schools, dormitories, resorts, etc.
~ Gallons-per-flush (GPF) over the years: 1920s to 1950s 7 GPF ~ 1960's & 1970s 5 GPF ~ 1982 3.5 GPF ~ 1994 1.6 GPF ~ 2010 1.28 GPF.
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