Ms. Wen from Leshan, Sichuan, was the first customer to install a complete ChengRongTimes mineral-retaining water filtration solution, including a main-line whole house water filter and an under sink water filter for drinking.
Unlike a typical installation project, Ms. Wen’s case involved several unexpected challenges, from site conditions to installation details, which required close communication and on-site problem solving.
That is why we decided to document this project in a series of articles, sharing not only the installation process, but also the practical experience we gained along the way.
What Does a Complete Whole-House Water Filtration System Include?
Many customers understand whole house water filtration system from only one part. Some think of it as an under sink water filter installed in the kitchen, while others associate it mainly with a whole home water filtration unit installed on the main water inlet.
In fact, a complete whole home water filtration system usually includes both parts: a main-line whole house filtration system and an under sink water filter.
The main-line filtration system is installed at the water inlet to improve the overall water quality throughout the home. It helps filter water used for bathing, laundry, dishwashing, vegetable washing and other daily household needs. It also helps keep the home’s water pipes cleaner and may extend the service life of water-using appliances.
The under sink water filter, on the other hand, is designed specifically for drinking and cooking, with a focus on cleaner water and better taste.
Why Ms. Wen Chose Mineral-Retaining Under Sink Water Filter for Her Family
Ms. Wen chose the ChengRongTimes mineral-retaining under sink water filter mainly because she has a baby at home and wants cleaner, healthier and better-tasting drinking water for the whole family.
For her, a under sink water filter should not only make water cleaner, but also improve taste while retaining the natural minerals and trace elements in the water.
ChengRongTimes mineral-retaining under sink water filter is equipped with premium activated carbon fiber, rather than conventional activated carbon, and ChengRong Factory’s self-developed 0.01μm residual-chlorine-removal ultrafiltration membrane, which is the one and only in the world.
According to the test report issued by the Shenzhen Academy of Metrology and Quality Inspection, the ChengRongTimes mineral-retaining under sink water filter can reduce up to 99.99% of bacteria, viruses, residual chlorine, sediment and other particulate impurities in the water.
More importantly, it could also help retain naturally occurring minerals and trace elements in the water, delivering a clean, better-tasting and mineral-quality drinking water experience. This one-of-a-kind filtration result is what makes ChengRongTimes truly different from conventional RO water filters.
Authoritative Third-Party Testing: Verified Safety and Mineral-Retaining Performance
To verify the performance and safety of the ChengRongTimes mineral-retaining under sink water filter, ChengRongTimes has conducted authoritative third-party testing and obtained official certifications from recognized institutions.
- An official water hygiene approval certification, Approval No. Yue Wei Shui Zi (2026)-02-S0177.
- SGS material safety testing based on relevant requirements of the NSF/ANSI 58-2023 standards
- Shenzhen Academy of Metrology and Quality Inspection report CJ/T 94-2005 direct drinking water standard
According to the test results, ChengRongTimes mineral-retaining under sink water filter can reduce up to 99.99% of tested bacteria, viruses, residual chlorine, sediment and other particulate impurities under specified testing conditions. At the same time, it helps retain naturally occurring minerals and trace elements in the water.
Unlike conventional RO systems that remove all the substances from water, ChengRongTimes mineral-retaining under sink water filter is designed to reduce unwanted substances while preserving the beneficial minerals naturally found in water.
The test results show that the ChengRongTimes mineral-retaining under sink water filter can produce cleaner, better-tasting water while helping retain naturally occurring minerals and trace elements — a rare drinking water quality that is hard to find elsewhere in the under-sink water filter market.
These tests involve extremely high costs and impose stringent quality requirements on water filters themselves.
Many water filter brands on the market skip such tests for two reasons:
- One is to cut costs.
- The other is that the ultrafiltration water filters from our peers is not likely to pass the tests.
However, ChengRongTimes has passed all tests at the first attempt, a rare feat unmatched by almost any other player in the industry.
We shared these test reports with Ms. Wen, helping her better understand the filtration performance, safety verification and long-term reliability of the ChengRongTimes water filtration solution.
Why ChengRongTimes under sink water filter is clean, healthy and well tasted, while RO water filter can only have clean but unhealthy?
As a factory-backed brand, ChengRongTimes is supported by its parent factory, Shenzhen ChengRong Factory, which has 19 years of expertise in stainless steel inline ultrafiltration water filters and membrane technology, and ranks among the top three manufacturers in the industry.
From raw materials and semi-finished components to factory technology, craftsmanship, R&D and product design, ChengRongTimes operates at a level that ranks among the top 1% in the industry. This gives us full confidence in the quality, performance and long-term reliability of our whole house water filters and under sink water filters.
The core filter material of the ChengRongTimes mineral-retaining under sink water filter is the residual-chlorine-removal ultrafiltration membrane, an exclusive proprietary technology developed by ChengRong with no equivalent worldwide. Even global top-tier water filter brands have not achieved residual chlorine removal through ultrafiltration membranes, ChengRong has made it possible.
Water filtered through our residual-chlorine-removal ultrafiltration membrane shows no detectable residual chlorine, even when tested with the most advanced precision instruments currently available. This proprietary membrane technology from ChengRong Factory makes it possible to deliver mineral-retaining direct drinking water straight from the faucet.
In addition, the conventional filtration process in the industry usually follows this sequence: the ultrafiltration membrane or RO membrane first intercepts impurities, and then activated carbon is used to improve water taste.
ChengRongTimes adopts an innovative reverse process. Premium activated carbon fiber first improves the taste of the water, and then the residual-chlorine-removal ultrafiltration membrane further intercepts bacteria, viruses, residual chlorine, particles and other contaminants.
What many consumers may not realize is that activated carbon, while improving taste and absorbing residual chlorine, would also become a breeding ground for bacteria in the water. ChengRongTimes’ innovative structural design helps reduce the risk of secondary contamination caused by activated carbon fiber.
This is one of the key reasons why ChengRongTimes can deliver mineral-retaining direct drinking water that is cleaner, healthier, and better-tasting from the faucet.
After our detailed explanation, Ms. Wen clearly understood the advantages of the ChengRongTimes mineral-retaining under sink water filter.
Both the activated carbon fiber used for taste improvement and the residual-chlorine-removal ultrafiltration membrane are made with high-quality filter media benchmarked against international top-tier brands. In addition, the amount of filter media used is 2 to 3 times higher than that of many mainstream products on the market.
However, the installation of Ms. Wen’s mineral-like whole house water filtration system was far from smooth. The project involved several unexpected site conditions and installation challenges.
Despite these difficulties, the ChengRongTimes team successfully completed the installation through professional on-site problem solving and close communication with the customer. What made this project especially meaningful was not only the final result, but also Ms. Wen’s continued trust in ChengRongTimes throughout the process.
To keep this article focused, we will share the detailed installation process and the challenges encountered in the next post.
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