What do the numbers on a tire mean? The DOT number appears on the sidewall of all tires intended for sales in the U.S., and designates the location of manufacture, the week and year of production, and the specific tire.
Water heater anode rod or sacrificial anode is the important component part with only one purpose; to protect metal tank from corrosion. Use this article to learn how to replace the anode, installation tips, how it works, about different types and when to use each one.
Components of a Water Heater. Electric and gas water heaters have a number of components in common, including the drain valve, the TPR valve, an internal magnesium anode rod, dip tube and pipes for hot water and overflow/pressure relief.