The water hardness of different water sources in different regions is different, and the requirements for drinking water, domestic water and industrial water are also different. Different water purification products have different requirements for installation space, so the selected household water purifier products are also different.
Second, according to the purification characteristics of different household water purifier products, choose products suitable for your own home.
Some household water purifiers can remove physical pollutants such as scale, sediment and rust, some can remove chemical pollutants such as organic matter, inorganic matter and radioactivity, some can remove biological pollutants such as bacteria, parasites, spores and germs, some have large water output, and some have small water output ... In short, there is no universal household water purifier to meet various needs.
Third, some basic principles of purchasing water purifiers
● Confirm the type and purification capacity, and purchase cost-effective products as needed. Just buy an inexpensive water purifier. Cheap is affordable. Choose the type of water purifier and its performance and quality according to the local water source. Under the same conditions, compare the price level and give priority to buying products with higher cost performance.
Water purifiers are divided into general water quality processors and pure water processors. For consumers, if there is less scale, that is, the hardness of the water to be treated is not high, and there are no other special requirements for water purification and taste improvement, it is appropriate to choose a general water quality processor; If the hardness of the treated water is high, it is more appropriate to choose a pure water machine to remove calcium and magnesium ions from the water and reduce the hardness of the water.
● Confirm the health permit approval, certification certificate or relevant test report. In China's water purifier industry, the health licensing system is adopted, and only after obtaining the health license from the health supervision department can it be sold on the market. When purchasing a water purifier, consumers need to obtain the approval of the seller's production hygiene, and if necessary, go to local health supervision centers and related websites to check its authenticity. However, the sanitary license only tests the sanitary safety and sanitary function of the drinking water treatment device, but does not evaluate the structural safety and electrical safety. Therefore, when purchasing a drinking water treatment device, users need to ask whether the device has been tested for structural safety and electrical appliances, so that the seller can provide relevant certification certificates or test reports.
● Confirm the instructions for use of the product (nameplate and instructions). Instructions for use refer to information that tells users how to use the product correctly and safely, as well as related product functions, basic performance and characteristics. Usually in the form of instructions, labels, nameplates, etc. When purchasing a water purifier, consumers should read the product manual carefully to clarify the relevant information of the product.
● Confirm the removal effect claimed by the enterprise. When buying a water purifier, you need to ask the seller for the corresponding test report of the claimed removal effect (such as sediment, heavy metals, organic matter, virus, antibiotics and pesticides). And make clear which specific substances the product has removal effect on, not the category. For example, it is clear whether certain metals such as lead, cadmium, mercury and arsenic can be removed, but heavy metals cannot be removed.
● Confirm the cleaning method before use. Every water purifier has to go through a series of cleaning before getting drinking water to wash away impurities and harmful substances in the filter element, so the operation before use is very important. Consumers must know and understand the operation method, and contact the dealer or after-sales service department if necessary. In addition, the water stored in the water purifier for a long time has a drinking health hazard, so if the water purifier is not used for a long time, the water stored in the water purifier should be cleaned and purified before drinking.
● Understand the use cost and confirm the after-sales service ability. After sale, the water purifier mainly replaces the filter element. When purchasing, you should fully understand the replacement time, price, access and replacement method of each filter element of the water purifier. The water purifier with water storage tank should also know the life, replacement price and replacement method of water storage tank. When purchasing a water purifier, you must choose a brand with perfect after-sales service.