How to clean scale on electric water heater

Electric water heater is one of the most commonly used household appliances in our lives. With an electric water heater at home, you can take a bath at home, especially in the north. If there is no electric water heater at home, washing in winter becomes a big problem. The electric water heater heats water through electric current, so many times there will be some scale left in the water heater. The scale will affect the use and heating of the electric water heater, so descaling is very necessary. Do you know how to clean the scale of the electric water heater?

1. Before cleaning the electric water heater, you need to unplug the power supply, cut off any form of heating of the electric water heater, and close the cold water and hot water angle valves under the electric water heater.

2. Open the seal of the water heater and replace the magnesium rod inside the electric water heater. The function of the magnesium rod is to reduce the corrosion of the heating tube and cause the scale to produce a chemical reaction. The magnesium rod used for a long time will produce flocs or lumps wrapping the rod surface until the magnesium rod is completely consumed. Therefore, if you use the electric water heater for a long time, it is best to replace the magnesium rod with a new one in time, otherwise it will easily leak water and electricity.

3. Remove the limiting device of the pressure relief valve wrench (usually a component with a plastic square hole, a safety piece used to prevent the pressure relief valve from being accidentally opened), and use a plastic tube to connect the small tube at the pressure relief port of the pressure relief valve to draw out the water in the inner tank; turn the pressure relief valve wrench 90 degrees from the vertical position, and the pressure relief valve has been opened.

4. Disassemble the joint of the metal hose at the hot water pipe. You should see water flowing out of the pressure relief valve. Drain the water in the inner tank. When there is basically no water flowing out of the pressure relief valve, the water in the inner tank has basically been released, and most of the scale (floc) in the inner tank will be discharged along with it.

5. Next, connect the metal hose of the cold water pipe to the hot water outlet of the water heater, open the cold water angle valve, and let the cold water flush into the inner tank from the hot water pipe. At this time, you can see water mixed with scale continue to flow out of the outlet of the pressure relief valve. Repeat this step many times. After multiple flushings, the water flowing out of the pressure relief valve outlet is very clean, indicating that the inner tank is basically clean.

6. Restore the pressure relief valve to its original shape, put the lever down again, reconnect the hot water pipe with the hot water angle valve, and reconnect the cold water pipe with the cold water angle valve; open the hot water angle valve and the cold water angle valve respectively, and turn on the hot water faucet at the hot water pipe faucet connected to the hot water angle valve (such as the hot water faucet in the bathroom, or the hot water faucet on the washbasin). After water comes out of the hot water faucet, close the hot water faucet to ensure that the air in the inner tank has been exhausted and filled with water.

7. Check whether there is leakage at each joint. If there is leakage, reconnect it to ensure that there is no leakage at each joint. Plug in the electric water heater, turn on the power, check the heating situation, and if everything is normal, the cleaning work is completed.

Tips

The simplest way is to remove the water inlet and outlet pipes, gently shake the body to let the water in the inner tank flow out; then fill it with water again to clean it, and repeat this three or four times.

Before cleaning, the water temperature of the electric water heater should be below 50°C. At this temperature, the water can be discharged directly into the sewer pipe without affecting the pipe.

It is best to deep clean the storage type electric water heater once every three years.

How to clean the scale of electric water heater? After reading the introduction above, I believe everyone has understood how to better clean the electric water heater. The electric water heater is very important to our lives. Therefore, it is necessary to skillfully remove the scale in the electric water heater. This can not only extend the life of the water heater, but also heat the hot water faster to avoid wasting water and electricity.