Electric water heaters have become a popular choice among consumers due to their convenience and safety. However, many people are unaware that these devices still require regular maintenance. Neglecting this can lead to serious issues over time.
Recently, Mr. Wang from Ruyi Community experienced problems with his electric water heater. The unit wasn’t draining properly, and after contacting a repair technician, a significant amount of scale was found and removed. It turned out that the buildup had clogged the outlet, leading to poor water flow. But how did so much scale form inside the tank?
According to the technician, electric water heaters are equipped with a magnesium rod designed to reduce scaling and corrosion. This rod helps neutralize the minerals in the water, protecting the inner tank from damage. However, once the magnesium rod is fully consumed, it no longer offers protection. Without replacement, the tank may corrode, and the heating element could be damaged, potentially causing electrical leaks and posing a risk to users.
Our city is located in northern China, where tap water often contains calcium bicarbonate. When heated, this compound breaks down into calcium carbonate, which settles at the bottom of the water heater. This process is similar to what happens in an electric kettle — over time, a thick layer of scale builds up on the walls. In Mr. Wang’s case, his water heater had been in use for nearly ten years without any maintenance. The magnesium rod had long since worn out, allowing scale to accumulate rapidly and eventually block the drainage system.
It’s important for consumers to remember that even though electric water heaters are reliable, they still need periodic checks. After several years of use, it’s advisable to contact the manufacturer's service department to inspect and replace the magnesium rod if necessary. If you notice a decrease in water flow, it might be a sign of internal scaling or a corroded magnesium rod. Regular maintenance not only extends the life of your water heater but also ensures your safety.
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