If your toilet has been showing signs of wear or inefficiency ... water consumers in a home. Older models use up to 3.5 gallons of water per flush, compared to modern high-efficiency toilets ...

Consider the 140,000 times you're likely to flush a toilet over a lifetime, and it's easy to see why toilets guzzle nearly 30 percent of a home's water use. Replacing older, inefficient toilets ...