8 Primary Components of a Water Heater System


Every time we see a cylindrical tank in the corner of our basement, we are always thankful for the contribution they have given to comfortability and convenience within our homes. They provide us with domestic hot water to be used in bathing and most importantly are doing household chores during frost-months and sub-zero temperature. However, because we do not get in touch with this system, we are certainly not well acquainted with its parts and their functions which are definitely important when we conduct maintenance procedures with the system to retain its good state. So before touching anything in the system, make sure to know its parts and their functions so you can be assured that what you are doing to the system is right. To enlighten you and give you more knowledge about the system, here is the list of the seven primary parts of a water heater system.


Anode Rod

   An anode rod is basically known to be sacrificial. This is oftentimes made of either magnesium or aluminium and is usually situated within an electricity type or gas type water heater. This is the main water heater component that averts the formation of corrosion and abrasive activities within the system. Inside the water heater system, there might be a presence of materials that can damage the glass lined tank. When you have a sacrificial anode rod, you can be assured that your glass tank won’t be damaged by corrosion. But this rod will gradually dissolve because of the water substances, causing it to be termed sacrificial. This raises that need to regularly replace this component to avoid corrosion.


Dip Tube

   From the name it suggests, this is a tube that would be dipped in the tank to withstand high temperatures. The length of this tube can reach the bottom portion of the tank. This should reach the bottom part of the heater so that the cold water that comes through it will penetrate on the part of the heater where the water is heated with a gas burner.


Drain valve

   Your water heater’s drain valve can be either made out of plastic or brass. This is usually found at the bottom of the water heater tank because its primary function is to drain the contents of the tank for inspections or maintenance. This valve is indeed very helpful especially when you already need to flush certain debris out of the water heater tank because this debris might be dangerous to your system or it might be hampering the burner from heating the water content of the tank.


Electric heating elements

   The electric heating elements are very important for the water heater system because if makes heating possible. They emit heat energy for it to be absorbed by the water it is supposed to heat. These elements can be placed either on the top or the bottom portion of the system or they can be placed on both parts. But the heating element that is located at the bottom of the system is the one oftentimes doing the entire heating job. The heating element at the bottom heats the water that comes from the dip tube while the upper heating elements will reheat the water again when it is needed.


Expansion Tank

   An expansion tank is a small tank that is specially designed for cold water lines that directly leads to the water heater unit. This tank is used to secure the unit against the destruction that might be probably caused by high water pressure. Through this component, hammering caused by the flow of water with a high pressure will be averted which might as well cause an explosion of the destruction of the component.


Gas Burner

   A gas burner is oftentimes a round-shape burner located at the bottom part of the tank. This is as well very important because it transfers heat energy into the water to reach the desired temperature of the homeowner. When turning on your heater, the gas would pass through many ports first in the first phase of the heating cycle. These ports give even dissemination of energy before transferring it to the water contained in the water heater tank.



   The thermostat’s primary function is the heating process is to set and check the temperature of the water within that tank. This can automatically shut off some of the water heater element in the case of too much pressure within that tank, either the heating element or the glass flow.


Temperature and pressure relief valve

       The temperature and pressure relief valve is always the safety component of the system. It avoids an explosion from happening by releasing the pressure inside the tank when it is already too much. This is usually found in the upper portion of the water heater unit.