The average family of four could save about 25 gallons of water per day through the installation of toilet dams. The average commode requires about 5 gallons of water per flush. Today major plumbing appliance manufacturers are marketing low volume commodes which use 3 gallons of water per flush. These low volume commodes have been tested and they do perform as well as the old standard high volume models. These high costs may generally prohibit replacing commodes just to save water, but if you are planning to remodel the bathroom, these costs may not be prohibitive.
Most faucets have faucet aerators attached.
These faucet aerators will mix water and air and the capacity at the faucet is about 4 gallons per minute. Low volume faucet aerators will mix water and air and reduce consumption to about 2 gallons per minute. These devices are simple to install. All that is re- quired is to remove the old aerator and replace it with a new low volume aerator. These devices reduce the size of the cross sectional area of the supply line while maintaining the same water pressure.