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.
Top Reasons To Replace Your Anode Rod. 1  You want your water heater to last a long time. 2  It will cost you less to replace the anode rod than your water heater. 3  Water softeners can accelerate anode rod corrosion.  The water heater makes loud or multiple popping noises when heating 1  up. Your water heater is more than 5 years  old.