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Q.Recently my water bills appear to be rather high. None of the faucets appear to leak. Could it be a faulty drain valve? What else could contribute to a high water bill?
A. You may want to check to see if a toilet is leaking. First, check the water level to ensure that water is not overflowing the
tank by way of the overflow pipe. This is the pipe in the middle of the tank. It has small tubing connected to it. If water is running into the overflow, adjust the fill valve to stop the flow approximately one inch below the top of the overflow tube or to the water level mark stamped on the side of the tank.
Second, put a few drops of food coloring into the tank to test the flush valve mechanism. If the water in the bowl changes color within 15 minutes, this is an indication that water is leaking into the toilet bowl and that the ball or flapper needs to be replaced.
You could also have an underground water leak or broken pipe and that also would need to be evaluated by a certified plumber.