Q: When my wife and I were in Germany we noticed that many residential toilets did not have a water tank. This seems like a great idea. Are these kinds of toilets available in the United States?
—Pete Huggins, Hickory, N.C.
To find the source of a toilet leak, put a few drops of food coloring into the tank. If any colored water finds its way into the bowl, the flapper valve inside the tank is faulty. If it drips down the outside, replace the seal between the tank and bowl. Colored water puddling on the floor indicates a cracked wax seal beneath the toilet.
