It’s been twenty-five years since the government mandated that all new toilets sold in the U.S. be low-flow toilets. Yet often homeowners still view these water-efficient fixtures with a wary eye. It’s hard to imagine that a toilet that uses only 1.6 gallons per flush, the low-flow standard, can possibly do as good a job as that vintage porcelain faithful that uses a hefty three-to-seven gallons.
Fortunately, engineering and hydraulics triumph. Check out how a low-flow toilet works.
Gravity-Fed Low-Flow Toilets
When the low-flow standard was first introduced, homeowners had good reason to be wary. The first low-flow toilets simply reduced the size of the water tank without taking into account if the decrease in flush volume would still clean as efficiently. It often didn’t, which meant homeowners were double-flushing, defeating the entire purpose of the new standards.