Check that Toilet Drip!
Ever since the development of the cistern and the siphon toilet, flapper valves have leaked. The Wall Street Journal says that a leaky toilet is the most common reason for a spike in home water bills. The city of Portland, Ore., estimates a silent leak can waste as much as 300 gallons of water a day without anyone noticing. "Most toilet leaks are silent; you can't see or hear them," says Helga Kessler, public service manager with the St. Paul, Minn., water utility.It is easy to test for; put 10 drops of food colouring in the tank and come back in half an hour. They say that most leaks are caused by a bad "flapper," the circular object that covers the hole in the bottom of the tank. Flappers are fairly easy to replace, and you can buy one for less than $5 at a hardware store. (or get a flapperless toilet ::Wall Street Journal