When communicating with the customer about the pre-filter micro-ultrafiltration water purifier last time, I just noticed that the well water he used was reddish, leading me to suspect an excess of iron and manganese in his well water.
I firmly believe the core principle of doing business is to avoid adopting a detached "not my problem" attitude. As long as it falls within our professional expertise and capability, going the extra mile to help customers, ease their worries, and add value will always yield positive results. Moreover, high-quality customers are never the type to take advantage of others, so when we go all out with our full capabilities, unexpected rewards are sure to follow.
Most people only focus on how much they gain rather than how well they perform, standing out in today's highly competitive market, proving we can deliver is more value to customers, that's exactly why they choose us.
Fortunately, Chengrong Ultrafiltration Factory has our own water quality testing center. We asked the customer to send us a water sample, and we could provided him with free water quality testing.
The final results confirmed that the manganese content indeed exceeded the standard limits.

For such water quality, we generally recommend that customers should switch to municipal tap water. This is because municipal tap water fundamentally eliminates excessive iron, manganese, and other heavy metal ions at the source. It may still appear turbid, but its safety is guaranteed.
Although RO reverse osmosis water purifiers can filter out ions in water, there is no assurance of 100% removal efficiency. Additionally, these purifiers may occasionally experience malfunctions. Therefore, switching to municipal tap water is the safest and most reliable solution.
Furthermore, for well water, stream water, or mountain spring water that has not undergone treatment or the 105-item quality inspection by water treatment plants, we always advise customers to conduct a water quality test first. Only after verifying its safety should such water be used for daily drinking and living purposes.
The widespread belief that "lower TDS = better water quality" and "higher TDS = poorer water quality" is incorrect. In fact, the TDS value mainly affects water taste and the likelihood of scale formation from calcium and magnesium ions. True water quality depends on multiple critical factors: microbial content, heavy metal levels, toxic organic compounds, chemical fertilizer residues, pesticide residues, and more.
That’s precisely why we recommend municipal tap water, it undergoes 105-item quality inspections at municipal water treatment plants, ensuring safety. This is what makes municipal tap water a safe and high-quality water source.
Given that municipal tap water is both safe and generally clear, urban customers typically purchase water purifiers to enhance their quality of life, while rural customers do so to ensure a basic standard of living.
Rural well water, stream water, and mountain spring water often fail to meet safety and cleanliness standards. We have conducted water quality tests for several rural customers, and the results consistently show excessive iron and manganese. Many rural households also find thick sludge at the bottom of their water storage tanks.
It’s common to see online users researching various "tips to avoid pitfalls" when buying water purifiers. While they may seem knowledgeable, most of these tips are impractical and unproven, nothing more than useless "dragon-slaying techniques."
Many major brands are reluctant to tap into the rural market, yet they frequently use severely polluted water sources in their marketing to emphasize the importance of installing water purifiers. In reality, their products are primarily designed for high-quality municipal tap water.
When it comes to addressing turbid rural water sources like well water, stream water, and mountain spring water, ChengrongEra is almost unparalleled in the industry. Our ability to handle such complex water quality stems from 18 years of unwavering focus: all 280 employees at Chengrong Ultrafiltration Factory have dedicated themselves exclusively to mastering ultrafiltration technology as our core product.
Few competitors can match our level of focus and dedication.
ChengrongEra Ultrafiltration, No Worries for Customers
10-Year Rust-Free Guarantee
10-Year Leak-Proof Commitment
10-Year After-Sales Service Support
chengrongEra Water Purifiers, Never Compromise on Quality
Self-Introduction:
I’m Zhuang Beikan, a Chaoshan native born in the 1970s and a grassroots entrepreneur with 18 years of experience.
Chengrong Ultrafiltration Factory has specialized in stainless steel pipe ultrafiltration for 18 years. With a team of 280 dedicated colleagues, we are committed to excelling at one core product. Recognized as a top 3 manufacturer renowned throughout the industry, we stand out as a rare one-stop supply chain provider in the pipe ultrafiltration sector—and few peers can match our full-chain capabilities.
Numerous domestic and international leading water purifier brands have ultimately chosen to partner with us, the reason is simple, only Chengrong Factory can really make them peace of mind.
In 2025, Chengrong Ultrafiltration Factory is proud to launch our own brand—ChengrongEra—marking our official entry into the C-end market. This strategic move allows us to get closer to end-users: I sincerely hope to hear your genuine product feedback, so we can continuously refine our offerings in terms of filtration functionality, structural design, and manufacturing quality. Above all, we aim to live up to the trust you place in ChengrongEra.
For any questions related to ultrafiltration technology or products, feel free to add my assistant’s WeChat or contact us via ChengrongEra’s official email.
TEL/Wechat: 159 8882 8791
(Ms. Liu Jinlu, Claire also, Assistant to Mr. Zhuang Beikan, In Charge of Foreign Trade Operations)
Email: chengrongera2025@outlook.com