Traditional water heaters all work in a similar fashion. The primary difference between them is the fuel source, such as gas, electric or even solar energy. To understand how your unit works, the first step is to become familiar with the components of your system, and how they interact..Draining your water heater on a regular basis can save you a lot of headache and unnecessary costs. It’s an easy and simple task to perform as well..Regularly flushing out your water heater is an important task. Getting rid of gunk and mineral deposits that ac.ulate will help it run more efficiently and prolong its life.How to flush a water heater and how flushing helps to keep the heater’s performance high, remove the sediments and gunk, bad odor and bacteria that causes it..