Pre filters are gradually entering the public eye. But consumers who are new to pre filters may have questions: what exactly is a pre filter? Is it really necessary to install a water purifier when it has already been installed? This article will take a scientific perspective to provide a deeper understanding of the functions, roles, and installation necessity of pre filters.
What is a pre filter?
Pre filter, as the name suggests, is a filtering device installed at the front end of the household water pipeline (i.e. the main inlet, after the water meter). It usually uses a stainless steel filter screen as the core filtering element, which removes large particles of impurities such as sediment, rust, algae, insect eggs, etc. in water through physical interception, effectively protecting subsequent water wading equipment (such as water heaters, washing machines, water purifiers, etc.) from impurities and extending their service life.
The working principle of the pre filter
The working principle of the pre filter is relatively simple, mainly relying on its built-in stainless steel filter screen. When the water flows through the filter, impurities larger than the filter aperture are intercepted, while clean water passes smoothly and enters the household water system. As the usage time increases, the accumulation of impurities on the filter screen will gradually increase. At this time, simply open the flushing valve of the pre filter and use water flow to backwash the filter screen in reverse to discharge the impurities and restore the filtering capacity of the filter screen.
The role and advantages of a pre filter
Protecting water related equipment: Home water heaters, washing machines, water purifiers, and other equipment have very fine internal pipelines and filters. Once blocked by large particles of impurities, it not only affects the normal operation of the equipment, but may also cause damage. The pre filter can effectively intercept these impurities, provide a clean water environment for subsequent equipment, and extend the service life of the equipment.
Improving water quality: Although the pre filter cannot remove harmful substances such as bacteria, viruses, heavy metals, etc. from the water, it can significantly reduce suspended solids and impurities in the water, making the water clearer and improving the water outlet feel. Especially for direct drinking tap water, the pre-treatment effect of the pre filter cannot be ignored.
Energy saving and emission reduction: Due to the pre filter reducing the damage of impurities to water related equipment, the frequency of equipment maintenance and replacement is reduced, indirectly achieving energy saving and emission reduction. Meanwhile, clean water quality also helps to improve the heating efficiency of equipment such as water heaters, further saving energy.
Economical: Compared to other water purification equipment, the price of the pre filter is relatively affordable, and there is no need to frequently replace the filter element. It only needs to be regularly flushed, and the maintenance cost is low.
How to choose the appropriate pre filter?
When choosing a pre filter, consumers should pay attention to the following aspects:
Filtration accuracy: Choose the appropriate filtration accuracy based on the water quality of the household, and it is generally recommended to choose a filter between 40-100 microns.
Material and Craftsmanship: High quality stainless steel filters and corrosion-resistant body materials ensure the long-term stable operation of the pre filter.
Flushing method: Choose products with automatic or manual convenient flushing functions to reduce maintenance costs.
Brand and after-sales service: Choose well-known brands and products that provide comprehensive after-sales service to ensure worry free purchasing.