An efficient toilet or flush valve can really save money on your water bill. Some flushometers use less than 2 gallons of water per flush while others flush almost 5 gallons! To check if your toilet is silently wasting water, place a few drops of food coloring in the tank. If the colored water makes it to the bowl without flushing, you are losing water.
Water-saving Sloan Flushometers can be found at www.supplyhouse.com