Before replacing the anode rod in a water heater, ensure all power to the unit is turned off and the water supply is shut off. It's also a good idea to drain some water from the tank to reduce pressure and prevent any spillage during the replacement process.
Anode rods are usually installed and kept in the heater for several years, so it may be a bit hard to get loose. You can try using a "breaker bar" for better leverage or you can also try tightening the rod just a little to loosen up the threads.
The Impact Wrench: An Effective Tool for Anode Rod Removal
This tool stores energy in a rotating assembly. Then releases it to the output shaft, enabling it to remove even the most stubborn anode rods.
Anode Rod Replacement: While an anode rod costs between $20 and $50, a plumber can replace it for $50 to $150. The job typically takes about an hour. The anode rod protects the tank from corrosive materials and needs to be changed every few years. Water Heater Tank Flush: A water heater flush kit can cost around $150.
The frequency of anode rod replacement depends on several factors, such as water quality, usage patterns, and the type of anode rod installed. In most cases, we recommend inspecting and potentially replacing the anode rod every 3 to 5 years.
The national average cost to flush a water heater is $160, but prices can vary in increments based on the tank size. A 30-gallon tank will cost between $90 and $120 on average, while a 70-gallon tank could cost anywhere between $180 and $250.
Over time, the metal in the anode rod will corrode away itself, leaving only a protective coating around the metal walls and bottom of your hot water tank.
An impact wrench is less than 2000 RPM, whereas a mid-torque pneumatic impact wrench can rotate at 8000 RPM or more. The impact driver is between the two at speeds up to 3600 RPM.
Changing the Rod
I found using that inexpensive impact wrench was by far the easiest method and takes just a few seconds. If you don't have a lot of ceiling height above your water tank, the rod may have to be cut in half to lift out all the way.
Magnesium rods offer better protection and water quality, while aluminum rods are more durable and ideal for hard water. Powered anode rods are the very best option for those seeking a long-term, low-maintenance solution.
If you notice signs of poor performance, such as discolored or rusty water, sulfuric or rotten egg smells, popping sounds from the tank, or high heating bills, inspect your water rod to determine if it needs replacement.
Aluminum Zinc Anode Rods
Zinc, unlike aluminum or magnesium, is not conducive to producing hydrogen sulfide. Therefore, when you replace the existing rod with an aluminum zinc alloy rod, it helps reduce the hydrogen sulfide gas, thereby mitigating the smell.
While sacrificial anode rods are critical to the health of your water heater tank, they can sometimes create issues with smelly water. For example, a corroded aluminum or magnesium sacrificial anode rod is a common cause behind water having a rotten-egg smell.
You'll need a socket wrench or breaker bar to take out the anode rod. The usual size is 1-1/16 inches, but it can change based on the heater. If the anode rod is really stuck, an impact wrench can help.
Instead, the anode rod gradually corrodes in place of the steel tank, extending the water heater's lifespan. In most cases, owners will need an anode rod replacement only about once every 3 to 5 years.
In general, you should be aware that you should not use an impact wrench to screw in conventional screws. For this purpose, there are cordless screwdrivers or cordless drill drivers, which you can also find in the Einhell range in numerous variants.
Impact wrenches are a game changer for both DIY enthusiasts and pro mechanics, usually being the difference between a productive day in the garage and a tiresome struggle with begrudging hardware.
A socket adapter can be used to convert the 1/4″ hex socket to a 1/2″ square drive. This will allow you to transform your impact driver into a wrench. An impact driver may not be strong enough if you have a problem. This is important to remember.
Step 3: Drain Water From the Tank
To make the old anode rod easier to remove, empty some of the water in the tank.
Should you drain your hot water heater every year? Yes, but that's really just the bare minimum. You should really drain and flush your water heater twice-per-year: once in the spring, and then again in the fall. The reason why comes back to what a water heater is flushing out: minerals and sediment.
In any case, water heater anode rods are essential for protecting your tank from corrosion, but they eventually wear out after around 3-5 years, depending on many factors including the hardness or softness of your water.
If neither you nor a professional have flushed your water within the last five years, Water Heaters Now recommends not flushing it yourself.
This is because the process of installing a new water heater can be quite complex and often requires the use of special tools and equipment. Additionally, the cost of labor for this type of project can be quite high.
You'll spend between $20 and $50 on the rod. If you choose to hire a water heater pro to get the job done, an anode rod replacement will cost you between $200 and $300. If you're not sure whether to handle this repair yourself, first examine your water heater.