Can water heaters rust? Most definitely! We’ve looked at how this can occur before and what it means for a water heater. Thes short version is that it usually means a water heater must be replaced. An extremely old water heater can begin to corrode, which is as good a sign as any that the unit is overdue for retirement. But younger water heaters can rust as well if they aren’t cared for properly.
This brings us to our topic today: the anode rod in a storage tank water heater, also known as the sacrificial anode rod for reasons that we’ll explain. One of the most important maintenance tasks to keep a tank water heater running for many years is to make regular anode rod changes—because the anode rod is one of the most important defenses a water heater has against rust and other types of corrosion. Follow us below as we look into the anode more.
What is an anode rod?
An anode rod is a long metal rod, usually made of magnesium, aluminum, or other combination of two metals, inserted into the water heater tank. Its main purpose is to protect the interior lining of the tank from corrosion. The anode rod attracts corrosive elements in the water, preventing them from rusting the tank.
How an anode rod prevents corrosion
The anode rod works through a process called electrolysis. Corrosive agents in the water are drawn to the anode rod rather than the tank walls. Over time, the anode rod corrodes and deteriorates instead of the tank. This process is why it’s often called the sacrificial anode rod—it “sacrifices” itself to rust to save the rest of the water heater. As long as the rod is intact and functioning, it will continue to absorb corrosion and protect the water heater.
How often does the anode need to be replaced?
The frequency of anode rod replacement depends on several factors, including the water quality and how often the water heater is used. On average, an anode rod should be inspected every one to three years. If it is significantly corroded or reduced in size, it needs to be replaced. Regular inspections during routine water heater maintenance will ensure the anode rod is always in good condition.
Rely on regular maintenance for anode replacement
Regular maintenance is key to getting your water heater to last up to its estimated service life. Professional inspections allow technicians to monitor the condition of the anode rod and replace it as necessary. This proactive approach can prevent unexpected breakdowns and extend the life of your water heater, ensuring it operates efficiently and reliably.
We’ll maintain your water heater
You don’t want to end up with a damaged or rusted water heater in Clovis, because you’ll almost certainly need to have it replaced. If you want to avoid an early retirement for your water heater, make sure that you schedule water heater maintenance regularly with our experts. This gives a technician the opportunity to examine the anode rod and determine if it needs to be replaced. We’ll help your water heater enjoy the longest useful service life possible.
Call Purl’s Sheet Metal & Air Conditioning for water heater service. Uncompromised Quality & Customer Service Since 1952.