How to prevent scale from forming inside a liquid heater?

To prevent the formation of scale inside the liquid heater, you can start from improving water quality, controlling heating conditions, and using additives reasonably. The specific methods are as follows:
Improve water quality
Use softened water: If conditions permit, try to use softened water. You can install a household water softener to remove calcium, magnesium and other ions in the water through ion exchange resin, reduce the hardness of the water, and reduce the formation of scale from the source. For example, in some areas with hard water quality, installing a water softener and then using a liquid heater can significantly reduce the formation of scale.
Filter impurities: Use a filter to filter the water to remove impurities such as mud, rust, etc. in the water to prevent these impurities from combining with minerals in the water to form scale. You can choose to install a pre-filter or use a kettle with a filtering function to perform preliminary filtration on the water.
Control heating conditions
Avoid high temperature and long-term heating: Try to avoid heating the water to too high a temperature or heating it for a long time. Because the higher the water temperature and the longer the heating time, the easier it is for calcium, magnesium and other ions in the water to precipitate and form scale. For example, turn off the power supply in time after boiling the water, and do not let the water continue to boil for a long time.
Regular drainage: For some long-term liquid heaters, such as storage electric water heaters, the drain valve can be opened regularly to drain part of the bottom water. This can reduce the accumulation of minerals in the water and reduce the chance of scale formation. It is generally recommended to drain the water every 1-2 months.
Reasonable use of additives
Add scale inhibitors: Add an appropriate amount of scale inhibitor to the water. The ingredients in the scale inhibitor can react with calcium, magnesium and other ions in the water to prevent them from forming scale. But be careful to choose the right scale inhibitor and use it according to the requirements of the instructions to ensure safety and effectiveness. For example, in some industrial liquid heaters, professional scale inhibitors are added according to the water quality.
Use white vinegar or lemon juice: Adding a small amount of white vinegar or lemon juice to the water can also play a certain role in scale prevention. The acidic components in white vinegar or lemon juice can react with substances such as calcium carbonate and magnesium carbonate in the scale to dissolve them. Generally, 1-2 spoons of white vinegar or lemon juice can be added per liter of water, but this method is not suitable for all types of liquid heaters. Please check the product manual before use.
In addition, regular inspection and maintenance of liquid heaters to promptly detect and address problems that may cause scale can also help prevent the formation and accumulation of scale.