Latest articles on High-efficiency toilets HETs 
San Francisco offers rebates for switching to high-efficiency toilets(21/02/2011)
For over a decade now, Federal law has mandated that toilets sold in the United States cannot exceed 1.6 gallons of water per flush. These models are called Ultra-Low Flush (ULF) toilets. Before this requirement, toilets flushed at 3.5 to 7 gallons per flush (gpf). Nowadays, ULFs are the highest flow models available on the market. The newest, most water efficient toilets are called high-efficiency toilets (HETs), and are defined as models that flush at 20 percent below the Federally-mandated... [more]
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