It is necessary.
From the comparison of water purification effect, ultrafiltration & lt; nanofiltration & lt; reverse osmosis, reverse osmosis water is called pure water. Ultrafiltration and nanofiltration need activated carbon with the removal of chemical contaminants. Reverse osmosis also has activated carbon cartridge, but it mainly plays a role in protecting the reverse osmosis membrane, reverse osmosis membrane itself can remove chemical pollutants. The filtration precision of nanofiltration is between ultrafiltration and reverse osmosis, and its advantage is that it removes harmful substances and retains inorganic salts that are beneficial to the human body.
Different regions have different water hardness, calcium and magnesium ions in the water in the northern region is high, easy to scale, you should buy a filtered water purifier with ion exchange resin cartridges; and chlorine in the water, the taste of the heavier areas can buy more activated carbon water purifier; for serious pollution, need to drink directly in the family, you can buy reverse osmosis.
Water purifier purchase and installation of the "four notes"
One, pay attention to consider whether to leave enough installation location.
Water purifier is closely related to home improvement products, mainly installed in the kitchen. Selection also need to consider the body height, thickness, width and height of the kitchen closet and other issues. If consumers choose to buy a water storage tank type water purifier, there are also issues such as water and electricity connections. Therefore, consumers in the home improvement, should be considered in advance of the safety of water and electricity connections to ensure that the water purifier installed in place will not occur after the leakage of water, running danger.
Second, pay attention to the choice of products with health permits
Water purifiers are water-related products, each product should be listed by the book supervision department to ensure that the quality of water and related quality in line with national standards and norms, issued by the provincial health department of health permits to go on sale.
Since the water purification industry is not standardized, some small businesses in order to save costs, in the absence of health permit approvals, or a variety of products to use a health approval of the case of illegal sales. Here, consumers in the purchase of water purifiers should pay attention to check whether the product has a health permit approval, consumers can also be through the National Health Planning Commission website, health permit approval query.
Three, pay attention to the selection of good after-sales service brand
The installation of water purifiers is more complex, and is a water-related products, their own installation or replacement of the cartridge there are security risks, is not suitable for users to install their own. Consumers in the purchase of water purifiers, should also consider whether manufacturers and merchants have the ability to install the service at home. At the same time, water purifiers need to replace the filter after a period of time, is a need for long-term after-sales service products, should be considered when buying manufacturers, merchants have a stable, high-quality local after-sales service.
The above content refers to the people's network - household water purifier, the usefulness of the people's network - home lecture hall: water purifier purchase and installation of the "four attention"