Leaks from a home's toilet can waste over 10,000 gallons of water per year, enough to wash laundry for 10 months. A leaky toilet alone can lose thousands of gallons in a single month. The most common cause is an old, faulty toilet flapper which can be replaced inexpensively. Replacing an entire leaking toilet with a Watersense labeled model can save money on water bills and conserve water resources.