Leaks from an average home's toilet can waste over 10,000 gallons of water per year, enough to do laundry for 10 months or fill a swimming pool in a year. A leaky toilet often wastes thousands of gallons per month due to a faulty flapper, which can be inexpensively and easily replaced by homeowners. When replacing an entire toilet, choosing a Watersense labeled model can save money on water bills and reduce environmental impact.