First things first, let’s make sure the definition of a water heater is clear. A water heater is a type of tank that heats, stores, and provides hot water wherever it is necessary, such as in the shower or the kitchen faucet.
Water Heater Components: Anti-Corrosion Anode Rods
Water heater tanks have 1-2 aluminum or magnesium anode rods that protect any exposed steel from becoming corroded. They are sometimes called sacrificial anode rods or anti-corrosion rods. If your water heater has a 10+ year guarantee then it will typically have two rods for extra security.
Water Heater Components: Cold Water Shut-Off Valve
The main line water conditioning/softening system has a pipe that supplies water to the hot water heater. You should be able to find a shut off valve for the cold water supply on the water heater “supply” side. Here, you will be able to easily turn the water on and off if you ever need to replace or repair any part of your water heater.