Maintain your water heater
Maintain your new hot water tank by regularly removing sediment.
Once or twice a year, drain a bucket's worth of water out of the bottom of the tank. It often contains sediment. If sediment accumulates in the bottom it acts as an internal insulator to inhibit the transfer of heat from the heating elements to the water. This will cause the water heater to lose efficiency over time.
To remove the sediment, use a bucket or a hose to catch the water and open the drain valve near the bottom of the tank. Draw off water until it runs clear and the sediment has been removed. Probably two to five gallons of water will be enough to drain. Flushing the tank once a year should be sufficient unless there are higher concentrations of minerals in your area.
Be aware that draining an older tank can cause the tank to fail or
cause leaks in corroded areas.