How Does the Water Heater Anode Rod Work ?

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When metal sits in water it rusts and will sooner or later corrode down to nothing, we know thats common truth of nature. This might spell doom for water heaters as well steel interiors, but doesn’t thanks to the use of anode rods, which are also known as sacrificial anodes.

These very simple but ingenuous equipments “throw themselves around the sword” to ensure that water heaters can survive and keep operating for many years.

Sacrificial anodes are long cylinders of aluminum or even magnesium attached to a steel wire core. While it really is true that all metals rust in water, several metals corrode at different rates, which is assists sacrificial anodes protect the steel inside of water heater tanks.

how to check anode rod in water heater

Aluminium and magnesium are more reactive than steel, which is why anodes built from them will rust away completely before any rust occurs in the tank. As long as anode rods are replaced on a regular basis (once six inches in the core wire have been exposed by corrosion a fresh one is required) the lifetime of a water heater tank might be prolonged indefinitely.

Several sacrificial anodes are attached into the top area of water heater tanks whilst some others are inserted through hot-water outlets as part of a larger pipe assembly. Water heaters manufactured for house usage often contain one of each type, both designed from the same metal to make sure right operation.

What does the anode rod do in a hot water heater ?

Water heater companies developed an amazing concept when creating the methods that heat water: the anode rod. You observe, with out this part, a water heater will rapidly succumb to corrosion and rust, and need replacing after just several years.

There is just 1 concern with the rod: It is not made to last as long as the water heater. Consequently, proper water heater repair need to involve consistently looking at the rod, and changing it as needed. Tankless water heaters never have anode rods, but common tank-style heaters should have.

Powered Water Heater Anodes

If utilized in conjunction with soft water sacrificial anodes might corrosion quicker than usual and might have to be changed regularly, probably each 6 months if the water is incredibly soft.

Powered Water Heater Anodes

The finest solution to prevent this problem is a powered anode, that is attached to an electrical socket and functions to prevent corrosion inside water heaters by giving a small, continuous electric current.

Powered anodes also are suggested when odor-causing germs infect a water heater tank and send harmful fumes running up water pipes, though special sacrificial anodes created from zinc oxide and aluminum also are perfect for counteracting this kind of issue.

Whilst sacrificial anodes price around $45 and $75, powered anodes usually have a price somewhere north of $200. Certainly a powered anode doesn’t need to changed every 1-3 years the way the typical sacrificial anode does. How to change the water heater anode rod :

  • Turn off the heater.
  • Make the water supply off.
  • Recommendation is to drain few gallons from the drain valve at the base from the water heater.
  • Drain the heater utilizing the garden hose and path to the open drain. Open a nearby hot water tap to vent heater for draining. Drain to the point under the outlet connection nipple.
  • Close drain spigot and take away the hose pipe.
  • Take away the water heater anode rod utilizing the proper tool.