There are a lot of small parts that work behind the scenes to keep your heater operational. One of the water heater’s unsung heroes is the anode rod. This small device manages to protect your heater from internal damage.
How does a simple strip of metal keep an entire water heater tank from corroding? Here’s what you need to know.
Quick Takeaways
- Anode rods stop rust and corrosion from damaging your tank.
- They prevent damage by attracting corrosive minerals to the rod instead of the tank.
- This process, which is called sacrificial corrosion, greatly expands your tank’s lifespan.
- The typical anode rod needs to be replaced every three to five years.
What Does an Anode Rod Do?
An anode rod keeps corrosive metals from eating away at the interior of your water tank. The anode rod attracts problematic minerals, like calcium and magnesium, so they damage the anode rod instead of the tank. By sacrificing itself, the anode rod ensures your expensive tank lining isn’t eaten away by rust.
What Is an Anode Rod?
An anode rod looks like a small cylinder of metal. It’s usually made of magnesium or aluminum, but some tanks use zinc anode rods. The anode rod is located inside your tank and usually hangs from the top of your tank.
How an Anode Rod Works
Corrosion occurs when minerals in the water interact with the metal of your water heater tank and create new chemical compounds that are much weaker than the originals.
However, anode rods are made out of a material that corrodes more easily than the interior of your tank. The harmful minerals in your water are drawn to the rod, so they corrode it instead of the rest of your tank.
Types of Anode Rods
Anode rods come in three common styles:
- Magnesium anode rods: This is the most common type of rod. It works well for areas with soft water.
- Aluminum anode rods: Aluminum rods are a popular choice if you live in an area with hard water.
- Zinc anode rods: This type of rod helps to reduce sulfurous odors in the water.
Why Anode Rods Matter for Your Water Heater
Anode rods are important because they keep your tank from corroding. This corrosion prevention extends the lifespan of your water heater.
It also prevents untimely leaks that could cause excessive damage to your home. In the long run, anode rods can save you hundreds, or even thousands, of dollars.
Signs Your Anode Rod Needs to Be Replaced
Anode rods only work properly if you replace them regularly. Here are some signs it’s time to replace your anode rod:
Water that is brown or orange- Water that smells like rotten eggs or sulfur
- A water heater with reduced efficiency
- A water heater that is more than five years old
- An anode rod that looks small and crumbly
How Often Should You Replace an Anode Rod?
The general rule of thumb is to replace your anode rod every three to five years. However, many factors affect lifespan. You might want to replace it more frequently if:
- You have very hard water
- You use your water heater very frequently
- Your water is very acidic
- Your water has high oxygen concentrations
- You keep your tank at a very high heat
What Happens If You Don’t Replace the Anode Rod?
If you skip anode rod replacement, all the metal on the rod will corrode. Once the minerals in your water no longer have the anode rod to corrode, they’ll begin to corrode your tank instead. Your tank will start to rust, and this will make it less structurally sound.
If you ignore an anode rod replacement for too long, your tank will eventually begin to leak, and you might need to replace it altogether.
Can You Replace an Anode Rod Yourself?
As long as you have a socket wrench and a new rod, you can technically replace an anode rod yourself. The process simply involves detaching the old rod, removing the old rod, and attaching the new rod in place.
However, DIY anode rod replacements often fail when the person tightens the rod too much, picks the wrong rod size, or drops the rod inside the tank.
When to Call a Professional for Anode Rod Replacement
Make sure to call a professional if you’re confused. Some tanks have unconventional fittings, or you might need help if your rod is stuck in place. Getting help is easier and cheaper than making a mistake that damages your tank. It’s also smart to get assistance if you notice issues such as:
- Corrosion on the outside of your tank
- Strong odors that persist after replacement
- Rusty water that persists after replacement
- Visible damage to your water heater fittings
FAQ
How do I know if my anode rod is bad?
Your anode rod might be bad if you have discolored water, smelly water, or a tank that is more than five years old.
Does every water heater have an anode rod?
If you have a water heater with a tank, it probably has an anode rod. The only heaters without them are usually tankless.
How long does an anode rod last?
An anode rod typically lasts three to five years, depending on your water quality. Regularly flushing your water heater can help extend its lifespan.
Can a bad anode rod make water smell?
Yes, when an anode rod is corroded, you might notice a rotten egg smell caused by high sulfur content.
Is replacing an anode rod worth it?
Yes, replacing an anode rod is a simple, affordable task that greatly expands your heater’s lifespan.
Need Help With Your Water Heater?
If you’re noticing any signs of an outdated anode rod, turn to the punctual plumbers of Niceville. At Benjamin Franklin, our team of licensed plumbers provides quality water heater repair service.
We’ll replace your anode rod quickly, so you don’t have to worry about untimely leaks and expensive water heater replacements later on. Call or message us today to schedule prompt, reliable service for your water heater.