Caring for your water heater might not be high up on your list of things to do, but it is something that definitely should be on your maintenance list. No matter how high-quality water you have in the area where you live, you are bound to have minerals and contaminants in the water, and your water heater is one of the places where this can collect and then build up into sediment that can lower the efficiency of your water heater.
There is also the risk that rust could cause issues, or there could be problems with seals and valves deteriorate. If you notice water leaks around your water heater, this is a sign that something is wrong with it.
Some things that you can check are your pressure release valve and the drain valve. You want to make sure that the pressure release valve works properly by releasing steam when you open it. The drain valve is usually underneath the water heater, and by using it you can get rid of some of the sediment in your water heater.