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Can Anode Rod Be Removed With an Impact Wrench?

Many people are not aware that anode rods should be removed and replaced. If you were one of those people, this is your wakeup call. You should be removing your anode rod about every three to five years and replacing it with a fresh one. If you don’t then it ceases to protect your tank and you end up with a tricky business trying to get the rusted mess out. Anode rods can become severely seized over time and not want to move with hand tools.

An impact wrench is just the thing for removing your anode rod. It has the power necessary to get the job done, but there are some precautions you should take if you are planning to remove your anode rod with an impact wrench.

Anode rods can be removed with impact wrenches. They fit into smaller spaces and take less effort than tools relying on leverage. Electric-powered wrenches are better than air-powered ones. When using an impact wrench, wear safety gear, secure the tank, and stop when the bolt is loosened.

Impact Wrenches Are Great for Seized Anode Rods

To remove your anode rod, you’ll need to “break” the nut that holds your anode rod in place. There are a few ways to achieve this. If you have a breaker bar available, you may wish to try removing the nut this way. If a normal breaker bar isn’t enough to remove your anode rod, that means you’ll need something more heavy-duty.

Here are the 2 chief benefits to using an impact wrench to perform this heavy-duty task:

Fits into Tight Spaces

Impact wrenches are more compact than a breaker bar since they do not rely on leverage to create force. This means you will be able to remove your anode rod even if you do not have much room to do so.

You can buy corded or cordless impact wrenches. While cordless impact wrenches cost more, they are easier to fit into hard-to-reach places. This will make the awkward job of removing your anode rod from a tight space easier.

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Last update on 2024-03-27 / Affiliate links / Images from Amazon Product Advertising API

Less Physically Demanding

Removing an anode rod with an impact wrench does not require much effort in comparison to removing it with a breaker bar, which relies on some level of physical exertion. While you may be able to get the job done over an extended period with a breaker bar, an impact wrench will speed up the process and allow you to exert less effort.

The more tools you have to buy for the replacement of your anode rod, the more costly it becomes. Thus, at this stage, it might be a good idea to phone around for some quotes from plumbers. It may cost only slightly more but will cause you far less trouble.

Air or Electric Impact Wrench for Anode Rod Removal?

When choosing what impact wrench to use to remove your anode rod, you two main options. There are air-powered and electric-powered impact wrenches, and both have their upsides and downsides.

Electric is Preferred

Using electric in this case is preferred because electric offers a cordless options. This means you will be able to fit into tight spaces. Even with a corded variety, the cord will be thinner and less clunky than the hose from an air impact wrench.

Werktough 18/20V IW03 Cordless Impact Wrench Lion Battery 1/2” Electric Impact Wrench Battery Charger Included

The main downside of using an electrically powered impact wrench is that it will usually be slightly less powerful than an air variety. However, for the purpose of removing an anode rod, electric should be able to get the job done, so this is likely not of much concern.

Downsides of Using Air

Using air comes with a few notable downsides, which I will list here.

  • Convenience – If you decide to use an air impact wrench to remove your anode rod, that means hauling an air compressor down to your basement if it is not already down there. Additionally, there will be a hose running from your air compressor to the impact wrench which can be clunky and annoying.
  • Noise Level – Most air compressors are pretty noisy when running, which can be a nuisance for you and whoever is in your house while operating your impact wrench.

If you have an air compressor stationed in your basement and prefer the extra power an air impact wrench provides, the DP Dynamic Power 1/2″ Impact Wrench (amazon link) remains affordable while getting the job done. This wrench boasts 480 ft lb of torque, plenty to beat just about any nut.

For the best overall option, try the M12 Fuel Stubby 1/2″ Impact Wrench (amazon link). This wrench is incredibly compact and cordless, making it great for getting in tight spaces. It also boasts a 250 ft lb of torque, and it has 4 different speed settings so you can set it on a lower speed to remove the nut.

What Size Impact Wrench Socket for Anode Rod?

You will more than likely need a ½” impact wrench with a 1 1/6″socket. Some wrenches come with socket sets, but you can also purchase these separately. Consult with your water heater’s user guide to make sure this size will work, but it is the standard, so it should.

You must make certain that the impact wrench you purchase is a 6-point rather than a 12-point socket so that your socket doesn’t end up damaging the nut itself.

Tips for Using Impact Wrench for Anode Rod

There are a few considerations when removing an anode rod with an impact wrench that will help the process go smoother. Some of these were derived from the YouTube video below, which shows the process of removing a stuck anode rod with an impact wrench in detail.

Wear Safety Gear

You will want to be properly protected from any debris that may come from the anode rod as you work at it. The impact wrench may shake off some rust and impacted material into the air, which could get into your eyes if you are not protected.

Safety glasses and gloves are recommended for this reason. It doesn’t cost much to be properly protected, and you can find all you need on Amazon.

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Last update on 2024-03-27 / Affiliate links / Images from Amazon Product Advertising API

In the safety vein, you also need to ensure that your water and electricity are disconnected from your water heater before you begin the process of removing your anode rod. This is very important. Make sure to turn the breaker box off before you begin and drain your water heater with a hose except for a small amount of water to stabilize the heater while you work on it.

Secure the Water Heater When Using Impact Wrench

Since impact wrenches are so powerful, they may end up shaking the entire water heater if you do not have it secured properly. One way to stabilize the water heater is to keep a small amount of water inside while you work on it.

Holdrite QS-U Expansion Bracket, Stainless Steel

Make sure your water heater is properly mounted using mounting brackets to secure it to the wall or floor. It should be secure enough that there is no movement when you try to shake it. If it seems too loose or you do not have brackets holding it in place, you can purchase them here (amazon link) or tighten the ones you already have.

Only Use Impact Wrench to Loosen Bolt

An impact wrench should be used in short pulses to slowly loosen the nut that fastens your anode rod. If it is used on full blast, it may damage the anode rod or the nut the fastens it. You will want to pulse the impact wrench just enough to get the nut loose and then remove it the rest of the way with a less powerful tool.

Removing the nut the full way with the impact wrench could also cause the nut to fly off too fast. You will want to be able to control the speed, and once you have the nut loosened with the impact wrench, you should be able to do the rest with a breaker bar or socket wrench.

A breaker bar is a long bar attached to a socket that you crank to remove a nut from a bolt. This has some power behind it, while a socket wrench is about as powerful as the user. Which one of these is best for this job depends on how far you have removed the nut already.

I have another article with plenty more tips for removing your seized anode rod. You can also wrap the new rod with Teflon tape to reduce the chance of it seizing as well.

Anode Might Break

If the anode rod is fully used up and corroded when you are removing it, parts of it may break off into the water heater. This creates a hassle as it means you must do a few flushes of the tank to get the pieces out.

About Fluid Magnesium Replacement Anode Rods for Water Heaters (Magnesium Complete KIT 44")

If the pieces are too large to remove by flushing the system, you should try to fish them out by hand (only once the water is cooled or emptied!) or with rope or wire. Just make sure not to damage the interior of the tank in the process. However, if you are not able to fish out the pieces of rod, they should not damage the tank and they will deteriorate over time if left in the tank.


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