Is there a need to buy a pre-filter, my answer is yes. If you have installation conditions at home, or have installed a water purifier, I suggest that you can install a pre-filter, which can be used for many years for a few hundred dollars, and there is no need to change the filter element, and the pre-filter can have large particles of impurities in the tap water, which greatly reduces the filtration pressure of the first-stage filter element of the water purifier, and the brush inside the fuselage will regularly clean up dirty impurities, greatly prolong the service life of the water purifier filter element, reduce the cost of consumables, and is a very cost-effective investment.
However, there are many kinds of pre-filters on the market, the quality is uneven, and many pre-filters have false standard parameters, in order to avoid everyone becoming unjustly spent money, I will share with you the pre-filters I have used over the years, and I have sorted out this pre-filter evaluation guide, I hope to help you
First, the key points of Xiaobai to buy a pre-filter summary
1.Filter flushing method.
The pre-filter needs to be flushed regularly, and if the filter screen is not flushed thoroughly, it will not only easily lead to the blockage of the filter, but also directly reduce the service life of the filter, increase the maintenance cost, and greatly reduce the use experience.
At present, there are three types of flushing methods for pre-filter screens on the market: direct flushing, reverse flushing, and siphoning. The direct flushing effect is average, and there will still be impurities accumulation;The recoil effect is okay, but it has a certain effect on the water pressure. The best flushing effect is the siphon recoil type, which has the least impact on water pressure and the best flushing effect.
2.Material process.
Many businesses are frantically emphasizing the filtration accuracy and how high the effluent flow is, and they are silent about the material process. However, as the first line of defense for tap water into the home, the material process is the most important consideration.
The pre-filter mainly depends on the filter screen, the outer filter bottle material and the copper head. Most of the pre-filter screens are mainly made of 316L food-grade stainless steel, which is not much different, the main difference is the copper head and the filter bottle.
There are two kinds of copper heads: low-lead copper mouth and lead-isolated copper mouth, compared with low-lead copper mouth, the lead-proof copper port will not be directly with water when used, so as to avoid lead precipitation and be safer. However, the lead-separator copper port has very high requirements for the production process technology, which can only be achieved by individual professional water purifier brands.
The material of the filter bottle should be at the milk bottle level, which does not contain BPA, which is relatively safe. Secondly, it is necessary to withstand high and low temperatures, because the pre-filter is generally installed outdoors and needs to adapt to the changing temperature environment.
3.Filter accuracy.
Filtration accuracy is a hard indicator of the performance of water purification products, which is generally expressed in microns, indicating the pore size of the filter screen. Theoretically, the smaller the pore size of the filter, the higher the filtration accuracy of the pre-filter. However, theory is theory, practice is practice, and the more impurities intercepted by the aperture is too small, the easier it is to clog the filter.
At present, the filtration efficiency is high and it is not easy to clog the filter screen, but the filtration accuracy of 40 microns can filter out most of the large particles of impurities and small particles of harmful substances.
4.Effluent flow.
The amount of water filtered by the pre-filter per hour mainly affects the water pressure and water flow rate, and the water flow is large, and the water pressure will not be unstable in the home water equipment, and the use experience is better.
Second, the pre-filter measurement
1.Midea QZBW20S-27S pre-filter.
Midea's pre-filter uses high-pressure three-dimensional flushing technology, which uses high-pressure water flow to forcefully wash away the impurities of the filter screen, and clean the filter screen without disassembly. However, the measured water pressure is still not very stable, and the water flow rate with the shower will be large and small, and the bathing experience will be very affected.
The filtration accuracy is 40 microns, and with a 316L stainless steel filter, it can filter out large particles of impurities such as iron filings and green algae in the water, and the filtration performance is still good.
The official claim is 7T large flux, but there is no specific test report, the nameplate flow is only 5T per hour, the fly in the ointment is that the copper head is made of low-lead copper H62, and there is no isolation layer, which is easy to be corroded and polluted by long-term use, which is the main reason why I replaced this pre-filter.
2.Wheeldon P0038
As a professional water purification brand, Wheeldon's water purification strength is really hardcore, and the strength of real professional players should not be underestimated. The biggest highlight of this Wheeldon P0038 pre-filter is the use of 360° spin flow + 6 groups of matrix wiper + siphon backwashing, three-in-one, compared with other products on the market, Wheeldon's flushing filter and bottle body have a better and cleaner effect.
When using water, the water flow pushes the magic scraper to rotate at high speed, forming a swirl flow on the surface of the filter screen and filter bottle, and using centrifugal force to throw out impurities and prevent particles from adhering to the bottle body and filter screen. When the water stops, impurities settle to the bottom of the bottle for easy discharge. When the blowdown valve is opened, a siphon swirl is automatically formed, which takes away the impurities remaining in the filter screen and all corners like a vacuum cleaner, and the anti-clogging effect is really strong.
With a unique 6 groups of matrix wipes, close to the surface of the bottle and the filter screen, to efficiently wipe the impurities on the surface of the filter screen and the inner wall of the bottle, clean more thoroughly, reduce the probability of the scraping strip being stuck, solve the traditional brush is easy to shed, there is residual defects, and there is no need to worry about the filter blockage.
The most worth mentioning is that the copper head of Wheeldon P0038 has a lead isolation patent, with a built-in food-grade lining lead barrier layer, and the water is not in contact with copper, which eliminates the precipitation of lead, a harmful heavy metal, and is more secure and safer to use. There is also a utility model patent certificate issued by the state
The filter bottle is a polymer pressure-resistant explosion-proof filter bottle, or a bisphenol-free maternal and infant aerospace engineering material, which is more pressure-resistant, freeze-resistant and explosion-proof, and there will be no risk of freezing and cracking in winter.
The filter screen is made of food-grade 316L stainless steel integrated wrapped filter, which does not string water and does not produce secondary pollution, and with the best filter pore size of 40 microns, it can efficiently filter various impurities, and the interception rate is as high as 9857%, much higher than the industry standard, better filtration effect. If there is a water purifier installed at home, the filtration pressure of the follow-up filter element will be reduced, and the service life will be longer.
The water output of the nameplate is a large flux of 6t per hour, coupled with the flushing scheme of the automatic cleaning filter, the water flow speed is fast and stable, and the water pressure is not affected when the water is turned on at home at the peak of water consumption.
The cost performance is really high, and the product quality and reputation of international professional brands are guaranteed.
3.Haier HP15 backwash.
Haier's filtration accuracy is also 40 microns, and it is equipped with a 316L stainless steel filter, which can well filter out iron filings and large particles of impurities in the water.
The biggest highlight is the patented technology of blue crystal nano lead separation, which is oxidation and corrosion-resistant, not easy to rust when placed outdoors, durable, and has a good flushing effect with double-mesh high-pressure positive and negative flushing filters. The disadvantage is that the scraper is a symmetrical tooth structure, there will be gaps between the teeth, and the sewage discharge is not very thorough. Moreover, the measured shower opens the maximum gear, the water flow drops significantly, the double network structure makes the water flow through slowly, and the overall filtration speed is relatively low.
The biggest highlight is that it comes with a smart time memory disk, which records the time of each manual flushing, which is easy to check the flushing and maintenance time, and the functions are still relatively rich. Overall, it's decent.
However, the claim of the flow rate is a bit exaggerated, the actual flow rate of the actual nameplate is only 4 tons per hour, and the whole family is still a little stressed about using water at the same time.
4.Qinyuan f***08
Qinyuan's this is marked with a flow rate of 6 tons per hour, and I asked the customer service, but there is no report to pinch, and it is still suspicious. The filtration accuracy is also 40 microns, and the 316L stainless steel filter is used, and the filtration effect is still stable.
The use of positive flushing + siphon backwashing + double-sided rotary scraping, the bottle cleaning effect is still very good, and the rinsing is also very thorough. But there is no universal excuse, the installation is somewhat limited, not very suitable for the installation of old houses, and the installation has to make an appointment to submit information, which feels a bit troublesome, and has to wait for the appointment progress. Or when you place an order, you can choose to install it yourself, and it is more convenient to install it on your own.
III. Summary
These pre-filters** are almost,The functional experience is also different,Qinyuan f***08The flushing effect is very good,The experience is very good,The lack is that you need to make an appointment to install,It's almost meaningful。 On the whole, whether it is filter flushing or material safety, Wheeldon-P0038 pre-filter is the best one, not only the filter screen is flushed thoroughly, but also the patented lead mercury separator, the safety quack is good.
And the cost performance is also high, the pre-filter within 1,000 yuan is the first choice, and it is highly recommended for everyone to start the experience.