What is anode in hot water heater?
An anode rod or sacrificial anode is part of a hot water tank that protects your water system against rust. It is a very important piece of your hot water system to ensure the lifespan of your tank.
An anode is a steel rod that is surrounded by magnesium, aluminium or zinc and it is located on the top of water heaters. It works through a process called electrolysis.
The sacrificial anode will corrode instead of the water heater steel. Saving the hot water system from creating rusty water and bursting.
How often should you replace the anode rod in a water heater?
Many people are unaware that an anode should be replaced regularly. They assume that if a tank is producing hot water, then it is working fine. It is crucial to understand what is happening behind the scenes and internally of the unit.
Your hot water system, either electric, gas or solar has a shelf life of around 10-12 years. Depending on the condition of your system.
They may suffer from leaks, temperature and water pressure issues from time to time. But generally, if your anode rod is inspected and changed at the right time, you can increase the durability and overall life span of the tank. It is recommended to change your hot water tank anode rod every 3-4 years.
You should remove the anode,
- If it has been 3+ years since you last changed your anode rod
- Your hot water tank makes a popping noise when heating up
- You want to extend the lifespan of your water tank
- You notice bad smelling water
- You have a higher than usual water bill
How do you change an anode rod in a hot water heater?
You will need a replacement sacrificial anode, a bucket, impact socket. Make sure you have these materials ready.
Step 1: Turn off the power supply to your water heater. Then turn off the cold water supply which is located on the side or top of the unit.
Step 2: Drain the water. You can drain about 10% of water in the tank. Have your bucket or garden hose handy to divert the water outside. Attach your hose to the boiler drain which you can find at the bottom of the tank.
Step 3: Find the anode. You may have to remove the top lid and look inside of the heater.
Step 4: Removing the rod may prove difficult. Getting help from another person may be beneficial. Loosen the hex head bolt with the right socket wrench that is large and durable. Once the bolt is loosened, you can remove the anode rod.
Step 5: Install your new anode rod. You can use plumbers tape to wrap around the joint threads. Use your socket wrench to then tighten the rod into the opening. You should first tighten it by hand and then use the wrench at 180 degrees to finish it off.
Sometimes it is best to contact a licensed plumber to check the condition of your water heater. And they will have the right tools to inspect or remove and replace your new anode rod correctly.