To learn to purchase a water purifier, you must first understand the principle of water purifier classification.
Simply put, the water purifier is divided into single-stage filtration, two-stage filtration, three-stage filtration, four-stage filtration, and five-stage filtration. Single-stage filtration is only suitable for high-quality drinking water sources. Generally, the water source of tap water can not be drunk after being filtered; double-stage filtration partially removes organic and inorganic impurities, which can effectively adsorb residual chlorine in water and improve the taste of water. It is only suitable for high-quality drinking water. Better than single-stage filtration; three-stage filtration, clarifying water source... It is easy to see that the higher the filtration grade, the better the filtered water quality.
According to the water quality, we follow the following rules and purchase the water purifier correctly:
Pay attention to cost performance: the product quality is good, the performance is stable; the use is more convenient; the maintenance cost and the running cost are lower; there is strong professional technology and good after-sales service.
The domestic water uses soft water products, and the drinking water selects water with a certain hardness (140mg/L--200mg/L). Soft water and pure water are not suitable for long-term drinking water.
It is preferable to select a composite ultrafiltration machine in a region where the hardness of water is 170 mg/L or less.
For waters with a hardness of 170mg/L-250mg/L, it is best to use soft water products for showers and washing water. It is best to choose compound ultrafiltration water products for direct drinking water.
The hardness of water is more than 250mg/L. The washing water is preferably soft water. The drinking water is selected to be partially softened water (softened water and unsoftened water are mixed in a certain proportion) and filtered by the ultrafiltration machine.
A water-purifying water machine containing high-fluorine, high-salt, high-sulfur areas is used as a direct drinking water and supplemented with trace elements.
In areas with heavy ground or sand and rust, it is recommended to install a precision filter after the main table.
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