If you are not ready to replace your faucets entirely, aerators may be added to your existing faucets. Aerators can be found in any hardware store and typically cost less than $5. f simply adding a new aerator to the fixture, unscrew the old aerator. Apply white pipe tape around the threads of the new aerator. Put the rubber washer inside the end and screw the new aerator onto the faucet. Run the water to test, making sure no water leaks out the side. If there is a water leak, gently tighten by hand until it is sealed tightly.

Showers

Low flow shower heads save about 50% of the water a conventional shower requires, or about 2.5 gallons per minute as compared to the conventional 4 or 5 gallons per minute. A good fixture will save water and still deliver a great shower. Using less hot water for your shower also saves energy because less water must be heated for the shower. Aerators can also be added to existing shower heads if you are not ready to replace the entire unit. Various models are available that increase spray velocity, reduce splash, while saving both water and energy.
 

Toilets

New toilets require less than one-third the volume of water of older models. Low-flow toilets use a maximum of 1.6 gallons of water per flush compared with about 3.5 gallons of water used by a standard toilet. If you are not planning to replace an existing toilet, you can install water-saving devices such as a toilet dam. A toilet dam can be made by simply filling a small plastic water bottle and placing it in the tank. Be sure to place it away from the moving parts in the tank so as not to interfere with flushing.