I’ve had a packed day and zero inspiration. I even thought about skipping writing today.
But I’ve kept up with writing articles every day this week—today’s the only one left. Skipping it would feel incomplete, so I’m here to jot down a few words anyway.
In the internet age, writing articles and shooting videos are also ways to make a living.
No one goes out to meet clients in person anymore, clients now find suppliers online themselves. The thought of "if I don’t write, clients won’t come to me automatically" pushes me to keep creating content.
See? This era no longer lets us just stick to our "basic duties."
Back when we only ran the factory, we just needed to make quality products and provide good service, and then clients would come to our factory to discuss cooperation. Now, we not only have to ensure top product quality and a great user experience but also promote ourselves online.
Otherwise, even the best "wine" will go unnoticed if it’s hidden in a "deep alley."
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A few days ago, I shot a video teaching everyone how to choose the right whole-house pre-filter based on their household water usage or the number of faucets.
ChengrongEra is arguably the first brand in our industry to clearly label membrane flux in product information.
Most others only label flow rate, and often with inflated numbers.
Why do we shift our focus from flow rate to membrane flux?
I’ve found that paying attention to the membrane flux of the filter element is the most scientific approach. Flow rate has little reference value because ultrafiltration performance will decline over time. When choosing a whole-house pre-filter, we must factor in this performance decline, otherwise, the filter will get clogged in just a few days.
I’ve summarized two simple formulas to help you pick the right whole-house pre-filter for your needs:
For users with a water tower:
Minimum required membrane flux of the filter element = 100 liters (average daily water usage per person) × number of family members × coefficient 5
For users without a water tower:
Minimum required membrane flux of the filter element = 300 liters (flow rate of a single faucet) × maximum number of faucets used simultaneously × coefficient 5
Users can fine-tune the result based on your actual household water usage, but the coefficient 5 remains fixed.
The membrane flux calculated by these formulas will definitely be on the higher side, that’s because I’ve factored in performance decline. For ultrafiltration systems, a larger membrane flux always means a better water usage experience, with stronger anti-clogging performance.
These formulas strike a balance between optimal water usage experience and economic cost.
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There are two main reasons why many users in our industry fail to use ultrafiltration (UF) systems properly:
1) Many users don’t know how to operate UF systems correctly—specifically, they lack knowledge of proper sewage discharge and backwashing.
2) Many users purchase filter elements with insufficient membrane flux.
After I posted the video explaining this, a user left a comment saying: “I installed a 3-ton external pressure under-sink UF system a few months ago, and it got clogged right away. Now I’ve moved it to another house to use as a standalone under-sink water purifier. It was only after the clogging issue that I started to learn more about this, and then I came across your video. Thank you, Director Zhuang, for sharing this knowledge.”
Now you understand why I say many people in our industry are unprofessional, right?
1) inflate flow rate figures.
2) Others only care about selling products and ignore post-sales support—often because they don’t have the expertise themselves.
Generally speaking, we do not recommend external pressure membranes for under-sink use. External pressure membranes only have a precision of 0.1 microns, which can filter out particulate impurities in water but cannot fully block bacteria and viruses. For under-sink applications, an internal pressure UF membrane with a precision of 0.01 microns should be used instead.
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Someone asked me: “Aren’t you afraid competitors will learn from the industry insights you share?”
My answer is no. In fact, I’d be happy if competitors could become more professional, create higher-quality products, and deliver better user experiences—all because of what I share.
Because only when the entire industry thrives can ChengrongEra stand on a bigger stage.
Chengrong Era Ultrafiltration, Customers have No Worries
Rust-free for 10 years
Leak-free for 10 years
After-sales support for 10 years
Chengrong Mineral Water-like Water Purifier, Never Compromise on Quality
