Choosing between a 1.28 gallons per flush (GPF) and a 1.6 GPF TOTO Drake depends on regional regulations and water-saving priorities. The 1.28 GPF model meets strict EPA WaterSense standards, consuming roughly 20 percent less water to lower municipal utility bills while utilizing advanced Tornado Flush momentum to maintain elite cleaning power. The 1.6 GPF model provides a slightly larger water volume, which is sometimes favored in older homes with exceptionally long horizontal drain runs.
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