Talk to a plumber or plumbing supplier about their recommendations. Installing displacement devices or water dams in the tank of an older, inefficient toilet is also an effective way to conserve water when flushing. A displacement device can be as simple as placing a gallon milk jug filled with rocks in the tank. These simple devices can often save 10 to 25 gallons of water per day. Do not use a brick, because particles from it could harm the plumbing.
Faucet aerators break flowing water into fine droplets and add air while maintaining a strong flow.
These inexpensive devices can be installed on older faucets and can reduce water use by as much as 60 percent. Appliances Be sure to check water-use ratings when buying new appliances like dishwashers or washing machines. An appliance that uses less energy also uses less water. Ask for information on water use before buying any appliance. New dishwashers use only about 9 gallons per load as compared to older models that typically use 20 gallons.