1Drain a couple of gallons of water from the water heater once or twice a year.
This will remove natural sediment buildup that can reduce energy efficiency. Follow your owner’s manual instructions for the proper way to do this.
2Set the water heater temperature to what’s appropriate for your home to maximize efficiency.
Every water heater has an adjustable temperature setting. Most people keep water heaters at a much higher setting than is necessary for their needs. This means they are wasting energy keeping water exceptionally hot for most of every day – while they are sleeping, at work, walking their dogs, etcetera. A setting of 120 degrees Fahrenheit (48 degrees Celsius) is generally sufficient and safe for most households.
3Set to "vacation" when away
If you go on vacation or are away for your home for an extended period, set your water heater to its "vacation" setting, if equipped. This will reduce energy consumption considerably.
4Replace the temperature and pressure relief valve in the event of any leakage from the valve