{"id":998,"date":"2026-08-28T09:38:12","date_gmt":"2026-08-28T01:38:12","guid":{"rendered":"https:\/\/www.chengrongtimes.com\/?p=998"},"modified":"2026-08-28T09:38:14","modified_gmt":"2026-08-28T01:38:14","slug":"ultrafiltration-pre-filter-water-flow-gets-smaller-how-to-choose-a-pre-filter","status":"publish","type":"post","link":"https:\/\/www.chengrongtimes.com\/?p=998","title":{"rendered":"Ultrafiltration Pre-Filter Water Flow Gets Smaller: How to Choose a Pre-Filter?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Many things are not our problem, but they are our responsibility.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This sentence has made me feel particularly deeply recently.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Half a month ago, a distributor customer suddenly sent me a message saying that his customer had purchased an <strong>ultrafiltration pre-filter<\/strong>. After using it for less than a week, the <strong>water flow of the pre-filter suddenly became much smaller<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After chatting for a while, I quickly figured out the whole story.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>ultrafiltration pre-filter<\/strong> he purchased actually had a membrane flux of only 7 tons, but when it was sold to the customer, the labeled membrane flux was 15 tons.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This was where the problem occurred.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why Does the Water Flow of an Ultrafiltration Pre-Filter Become Smaller?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The size of the water pipes in our homes is basically fixed. They are either one inch, six points, or four points, and household water pressure is also relatively stable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Therefore, the actual water capacity of a <strong>pre-filter<\/strong> cannot be judged only by the flow rate labeled by the seller. More importantly, it should be selected according to the actual household water consumption and the membrane flux of the filter element.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For ordinary small families, daily water demand is limited, and a membrane flux of 7 tons itself already provides a certain amount of surplus.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Therefore, in actual use, users may not notice a particularly obvious difference between an <strong>ultrafiltration pre-filter<\/strong> with a membrane flux of 7 tons and a device labeled as 15 tons.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Because users simply do not need that much water.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is also why some sellers habitually falsely label the membrane flux of the <strong>pre-filter<\/strong> in order to sell products, making customers feel that they are \u201cgetting a good deal\u201d\u2014spending the same amount of money but seemingly buying a higher-specification <strong>pre-filter<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, once this approach encounters a high-water-consumption scenario, the problem will immediately be exposed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Choosing the Wrong Pre-Filter Can Easily Cause Problems When Water Consumption Is High<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">My customer did not sell the <strong>pre-filter<\/strong> to an ordinary household, but to a school.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This <strong>ultrafiltration pre-filter<\/strong> needed to provide daily water for more than a dozen teachers. The actual water-using equipment included:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>6 shower heads<\/li>\n\n\n\n<li>2 washing machines<\/li>\n\n\n\n<li>2 sinks<\/li>\n\n\n\n<li>4 toilets<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Everyone can think about how high the water production load requirements of such a water-use scenario are for a <strong>pre-filter<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This was far beyond the load that the original 7-ton membrane flux <strong>ultrafiltration pre-filter<\/strong> could stably handle over the long term.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As a result, in less than 2 days of use, this <strong>pre-filter<\/strong> experienced an obvious decrease in flow rate and even became clogged.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Subsequently, the school contacted my customer and requested after-sales service.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">My customer then contacted me and asked what to do.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To be honest, from the perspective of responsibility allocation, <strong>the false labeling of the pre-filter membrane flux was not caused by our sales activities, but as a party providing products and technical services, we have a responsibility to help the customer solve the problem.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As a salesperson, I have always believed that the most important thing is not to sell the product, but to ensure the customer&#8217;s final user experience.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Therefore, I immediately sent my customer a new <strong>ultrafiltration pre-filter with a membrane flux 10 tons higher than the original one<\/strong> free of charge, and at the same time asked him to personally go to the school and help the customer replace it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Why?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Because falsely labeling the membrane flux was simply wrong on his part.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">A Pre-Filter Is Not Better Just Because It Is Larger; You Need to Choose the Right Model<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Now, the newly replaced <strong>ultrafiltration pre-filter<\/strong> has been operating for half a month.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The teachers at the school reported that the current water-use experience is very good.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This incident also made me realize once again: <strong>when choosing a pre-filter, you cannot only look at the flow rate promoted by the seller, and you certainly cannot only look at one attractive parameter.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">What really determines <strong>whether a pre-filter is good to use<\/strong> is the actual water demand of the household or application scenario.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">So, why have I recently been continuously explaining my two <strong><a href=\"https:\/\/www.chengrongtimes.com\/\" title=\"\">whole-house water purifier<\/a> purchasing formulas<\/strong>?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The reason is very simple.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Because when many sellers recommend <strong>pre-filters, ultrafiltration pre-filters, and whole-house water purifiers<\/strong> to customers, they basically rely on experience and intuition.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">There is no scientific basis and no real water consumption data to support the recommendation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Eventually, a very common problem appears:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Users report that ultrafiltration does not work well, and the water flow of the pre-filter becomes smaller.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">But in many cases, it is not that ultrafiltration does not work well, nor is it that the <strong>pre-filter<\/strong> does not work well. Instead, <strong>the pre-filter model was not selected correctly according to the actual water demand.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Choose a Pre-Filter? Look at Membrane Flux First<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For whole-house water purification, when choosing a <strong>pre-filter<\/strong>, you should pay particular attention to the membrane flux of the filter element.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Do not simply look at the flow rate labeled by the seller.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Because household water pipe sizes are basically fixed, but the actual water consumption of different households is completely different.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The requirements for a <strong>pre-filter<\/strong> are certainly different between a two-person household and a five-person household.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The requirements for an <strong>ultrafiltration pre-filter<\/strong> are even more different between an ordinary household and a scenario with many people using water simultaneously, such as a school, homestay, or hotel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Therefore, <strong>how do you choose a pre-filter? The key is to first calculate the minimum membrane flux required by the filter element according to actual water usage, and then select the corresponding model based on the membrane flux.<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How to Choose a Pre-Filter If You Have a Water Tank?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If your home has a water tank, you can use:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Total household water consumption \u00d7 coefficient 5 = required minimum membrane flux<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Generally speaking, the average daily water consumption per person is 100 liters.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Therefore, the minimum membrane flux required for the filter element of a five-person household is:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>100 liters\/person \u00d7 5 people \u00d7 coefficient 5 = 2,500 liters<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Therefore, in this situation, you can choose an <strong>ultrafiltration pre-filter with a membrane flux greater than 2,500 liters<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It is important to note here that this is only model selection based on the calculation formula you provided. When actually selecting a <strong>pre-filter<\/strong>, you also need to comprehensively consider the number of people in the household, water-use habits, the number of water outlets used simultaneously, and specific equipment parameters.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How to Choose a Pre-Filter If You Do Not Have a Water Tank?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If your home does not have a water tank, you can use:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Number of faucets \u00d7 coefficient 5 = required minimum membrane flux<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Generally speaking, the flow rate of one faucet is 300 liters.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the whole-house water purification system needs to simultaneously support the flow of 5 faucets, while you want to basically maintain the water pressure, then:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>300 liters\/unit \u00d7 5 units \u00d7 coefficient 5 = 7,500 liters<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In other words, in this situation, you should choose an <strong>ultrafiltration pre-filter with a membrane flux greater than 7,500L<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is why even for household use, different households may have completely different requirements for the model of their <strong>pre-filter<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The Water Flow of the Pre-Filter Becomes Smaller: What Should You Really Check?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If the <strong>water flow of your pre-filter becomes smaller<\/strong>, do not immediately assume that ultrafiltration technology is poor, and do not directly assume that the <strong>pre-filter is of poor quality<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">First, you should check the following issues:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>First, check whether the filter element is clogged.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the raw water contains a large amount of impurities and the filter element intercepts a large amount of impurities within a short period, it may cause the <strong>water flow of the pre-filter to become smaller<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Second, check whether actual water consumption exceeds the design capacity of the equipment.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the actual water consumption of the household or application scenario far exceeds the membrane flux of the <strong>ultrafiltration pre-filter<\/strong>, insufficient flow may easily occur.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Third, check whether the membrane flux labeled by the seller is genuine.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is a very important point when choosing a <strong>pre-filter<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the actual membrane flux is only 7 tons, but the product is advertised as 15 tons, then if the user operates it according to the 15-ton standard, the problem of <strong>the pre-filter water flow becoming smaller<\/strong> can easily occur.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Fourth, check the number of water outlets being used simultaneously.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A household may normally open only one faucet, so the <strong>pre-filter<\/strong> may seem to work very well.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, when multiple shower heads, washing machines, sinks, and other water outlets are used simultaneously, the actual load on the <strong>ultrafiltration pre-filter<\/strong> will increase significantly.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Therefore, to determine whether a <strong>pre-filter<\/strong> is suitable for you, you cannot only look at the user experience when using one faucet under normal conditions.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">When Selecting a Pre-Filter, Do Not Focus Only on Price<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Of course, this matter is also related to the professionalism of frontline sales personnel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">So I also told my customer that he should not falsely label the membrane flux of the <strong>pre-filter<\/strong> anymore.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This will not only affect the customer&#8217;s user experience, but will also affect his own reputation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Rather than giving customers a poor <strong>pre-filter<\/strong> user experience, it is better to recommend suitable equipment based on real data from the beginning.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Especially for offline sales, business reputation is of paramount importance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">I increasingly feel that this is the meaning of making videos and writing articles.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">On the one hand, it is to provide end users with educational information about <strong>pre-filters and whole-house water purification<\/strong>, so that consumers know how to choose a pre-filter;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">On the other hand, it is also to provide product and technical training for frontline distributors, so that sales personnel know how to select an <strong>ultrafiltration pre-filter<\/strong> according to the customer&#8217;s actual water demand.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">I believe that the ChengRongTimes brand should also have the same significance for our B2B customers.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Although everyone is competing on price now, the future will definitely belong to high-quality, high-value products.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Therefore, we should compete on product quality and service quality.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Although this road is difficult, it has a future.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Review the Pre-Filter Purchasing Formulas Once Again<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Finally, let&#8217;s review my two <strong>pre-filter purchasing formulas<\/strong> once again.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For whole-house water purification, the <strong>pre-filter model should be selected according to membrane flux<\/strong>, rather than simply looking at the flow rate labeled by the seller.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Because household pipe sizes are basically fixed, but the actual water consumption of different households is different.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Therefore, before choosing a <strong>pre-filter<\/strong>, you should first calculate the minimum membrane flux required by the filter element according to your actual household water consumption.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">With a Water Tank:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Total household water consumption \u00d7 5 = required minimum membrane flux<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Five-person household:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>100 liters\/person \u00d7 5 people \u00d7 5 = 2,500 liters<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Therefore, you can choose an <strong>ultrafiltration pre-filter with a membrane flux greater than 2,500 liters<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Without a Water Tank:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Number of faucets \u00d7 300 liters \u00d7 5 = required minimum membrane flux<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">5 faucets:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>300 liters\/unit \u00d7 5 units \u00d7 5 = 7,500 liters<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Therefore, you can choose an <strong>ultrafiltration pre-filter with a membrane flux greater than 7,500L<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Remember:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>How do you choose a pre-filter? It is not about looking at who labels the highest flow rate, but about looking at how much membrane flux your actual water consumption requires.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If the water flow of the pre-filter becomes smaller, it does not necessarily mean that ultrafiltration is poor. It may be that the equipment model does not match the actual water demand.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pre-Filter FAQ<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. What causes the water flow of a pre-filter to become smaller?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Common causes of <strong>smaller pre-filter water flow<\/strong> include a clogged filter element, excessive impurities in the raw water, actual water consumption exceeding the equipment capacity, too many water outlets being used simultaneously, and inconsistency between the actual membrane flux of the product and the advertised parameters.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. What should I do if the water flow of an ultrafiltration pre-filter keeps getting smaller?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If the <strong>water flow of the ultrafiltration pre-filter keeps getting smaller<\/strong>, first check whether the filter element is clogged, and then check whether the actual water consumption matches the equipment&#8217;s membrane flux. If the flow is obviously insufficient when multiple people use water simultaneously, the <strong>pre-filter<\/strong> model should also be reevaluated.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Is a pre-filter better if it has a higher flow rate?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Not necessarily. <strong>A pre-filter is not better simply because it has a higher flow rate; instead, the appropriate membrane flux should be selected according to actual water demand.<\/strong> Ordinary households and scenarios with many people using water, such as schools and homestays, have different requirements for pre-filters.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. How should I choose the membrane flux of a pre-filter?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">You should first calculate the actual water demand and then choose an <strong>ultrafiltration pre-filter with a membrane flux greater than the calculated result<\/strong>. For homes with and without water tanks, the corresponding formulas can be used for calculation.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. How much membrane flux does a pre-filter need?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Different households require different membrane fluxes. For example, according to the formula in this article, a five-person household with a water tank requires a minimum membrane flux of 2,500 liters; without a water tank and with simultaneous support for 5 faucets, the required minimum membrane flux is 7,500L.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6. Why is the water flow of the pre-filter very high at first but becomes smaller later?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">It may be because the filter element has intercepted more and more impurities during use, or because actual water consumption has exceeded the processing capacity of the <strong>pre-filter<\/strong>. If the flow rate decreases significantly within a short period, you should also check whether the actual membrane flux of the product is consistent with the labeled parameters.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">7. Is an ultrafiltration pre-filter suitable for every household?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Not necessarily. Choosing an <strong>ultrafiltration pre-filter<\/strong> requires comprehensive consideration of the number of people in the household, the number of simultaneous water outlets, piping conditions, actual water consumption, and filter element membrane flux. In particular, scenarios involving many people using water simultaneously require more scientific selection of the pre-filter model.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">ChengRongTimes Ultrafiltration, Customers Never Have Any Concerns<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>No rust for ten years<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>No water leakage for ten years<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>After-sales service for ten years<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>ChengRongTimes Water Purifiers never compromise with itself when it comes to quality.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"434\" src=\"https:\/\/www.chengrongtimes.com\/wp-content\/uploads\/2026\/08\/ChengrongTimes-1-1024x434.png\" alt=\"\" class=\"wp-image-999\" srcset=\"https:\/\/www.chengrongtimes.com\/wp-content\/uploads\/2026\/08\/ChengrongTimes-1-1024x434.png 1024w, https:\/\/www.chengrongtimes.com\/wp-content\/uploads\/2026\/08\/ChengrongTimes-1-300x127.png 300w, https:\/\/www.chengrongtimes.com\/wp-content\/uploads\/2026\/08\/ChengrongTimes-1-766x325.png 766w, https:\/\/www.chengrongtimes.com\/wp-content\/uploads\/2026\/08\/ChengrongTimes-1.png 1153w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Many things are not our problem, but they are our responsibility. This sentence has made me feel particularly deeply recently. Half a month ago, a distributor customer suddenly sent me a message saying that his customer had purchased an ultrafiltration pre-filter. After using it for less than a week, the water flow of the pre-filter [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-998","post","type-post","status-publish","format-standard","hentry","category-factory-diary"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"Many things are not our problem, but they are our responsibility. This sentence has made me feel particularly deeply recently. Half a month ago, a distributor customer suddenly sent me a message saying that his customer had purchased an ultrafiltration pre-filter. 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