A great routine for every homeowner is draining a quart or two of water from the tank every 3 months.
Sediment in water builds over time and can block the drain, cover the thermostat inside the tank and reduce the transfer of heat to the water.
A hot water heater can represent 15 to 20 percent of your energy cost. By flushing a quart or so of water once every 3 months, you can improve its efficiency and add life to your tank.
If you have an electric hot water heater, you should always turn off the electric to the tank. If you have a gas heater and are only removing a quart of water, you don't have to turn off the gas.
Connect a hose to the valve on the bottom of the hot water tank and drain the water into a floor drain or bucket. If you are concerned about hot water, you can turn off the tank and let it cool before you flush the water.
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