The anode rod is an essential component of your water heater that protects the metal lining from corrosion. It’s a steel core wire made up of either aluminum, magnesium, or zinc. The following guide will ensure you understand the importance of this component and when to have it replaced.

How Does It Work?

Water causes corrosion in the steel lining of the water heater. However, the anode rod inhibits the process through electrolysis. The more reactive metal of the rod corrodes before the less reactive metals present in the tank.

Aluminum, magnesium, and zinc are all more reactive than steel. The anode rod also produces electrons that protect the tank and its various components from corrosion.

If you have hard water, you should opt for an aluminum rod that will withstand the minerals in the liquid. Magnesium rods are best for homes with soft water, and zinc options can fight sulfuric odors.

What Are Potential Problems?

After the anode rod corrodes completely, it will no longer protect the heater. Depending on the amount of water passing through the system, you’ll likely need to change the component every four to five years. If you wait too long, the tank will corrode and eventually require a replacement. 

The component should also stay firmly screwed into the top of the heater. As water passes through, it will shift a loose anode rod around and cause it to scratch and damage the tank’s interior. It might cause cracks in the glass lining of the water heater, leading to expensive repairs.

Maintenance

The rod’s life expectancy will depend on the quality of the heater, water chemistry, and how much water you use. You should get the component inspected at least every three years. 

In addition, flushing out the system annually will give you a sense of the state of the anode rod. When you drain water out of the bottom of the tank, you draw out the sediment that has accumulated over time. If there’s a lot of white debris, the anode rod is no longer doing its job and needs to be replaced.

Maintain the anode rod and extend the life of your water heater with maintenance and repairs from Muotka Mechanical in Anchorage, AK. These heating contractors provide comprehensive furnace repairs, boiler replacements, and water heater services. Call (907) 344-8825 to speak with a friendly representative about how they can help warm your home. Read about their reputable services online.