If your water bill suddenly increases, but you haven't changed the way you use water, chances are you've sprung a leak. Leaky plumbing can waste several thousands of gallons of water a day. Even tiny pinhole drips that often go unnoticed add up fast. Leaking toilets can waste up to 14,000 gallons per day and cost consumers hundreds of dollars a month on their water and sewer bills. To learn how to replace the flapper in your toilet, please view the How to Replace the Flapper (PDF).