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.
For electric heater, water heater troubleshooting involves dealing with electrical devices. An important one is the heating element. These can burn out over time. A burned out element can cause you to have 'no hot water' or 'very little hot water'.