4 big untrustworthy remarks on the sale of water purifiers: look at your tricks
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Water and air are essential for human survival, but the growing issue of drinking water pollution has always posed a threat to our health. In recent years, media coverage has brought attention to water pollution, leading to an increased demand for water purification devices. However, the quality of these products varies greatly, leaving many consumers confused and unsure how to choose the right one. When purchasing a water purifier, there are four common myths you should be aware of. Let’s take a closer look.
**First, the lower the TDS value, the safer the water**
When buying a water purifier, salespeople often use a TDS meter to measure the water after it has been filtered. Tap water typically has a TDS value in the hundreds, and once it's filtered, the number drops significantly, which is used as proof that the water is cleaner. But does a lower TDS value really mean better water?
In reality, TDS (Total Dissolved Solids) measures the amount of dissolved minerals like calcium, magnesium, sodium, and potassium in the water. While high TDS levels may indicate more impurities, low TDS doesn’t necessarily mean the water is healthier or safer. Water quality depends on a variety of factors, including microbiological, chemical, and sensory indicators. The TDS value is just one of many parameters that determine water safety. So, don’t assume that lower TDS means better water — it’s not that simple.
**Second, using an electrolysis test proves water quality**
Some companies use electrolysis experiments to demonstrate the quality of water. This involves placing two electrodes into water and passing electricity through it. The resulting sediment is often shown as evidence of contaminants. However, this method is misleading.
The red-brown sediment produced during electrolysis is actually caused by the iron in the electrode reacting with ions in the water. Tap water naturally contains minerals, and when electrolyzed, it can produce visible flocs. This doesn’t mean the water is dirty — it simply shows that the water has some conductivity. Pure water, which lacks ions, won’t show any color change. So, don’t rely on this experiment to judge water quality.
**Third, no wastewater means poor filtration**
Some water purifiers claim that if they don’t produce wastewater, their filtration is ineffective. They suggest that without waste water, harmful substances remain in the purified water. But is this true?
From a technical perspective, the presence or absence of wastewater depends on the type of filtration technology used. Reverse osmosis systems do produce wastewater, while ultrafiltration systems typically don’t. The effectiveness of a water purifier should be verified through third-party testing, not just based on whether it produces waste water or not.
**Fourth, big brands are always reliable**
Many consumers believe that well-known brands are more trustworthy. However, not all big brands have a history of producing water purification equipment. Some are just resellers who outsource manufacturing to Chinese factories. Others may not even understand the specific water pollution issues in China, and their products might not effectively remove heavy metals, pesticides, or hormones. Always check for government approvals and verify the brand’s background before making a purchase.
**In conclusion:**
The rise in water purifier usage reflects growing awareness of health and safety. However, the market is flooded with misleading claims and untrustworthy products. Be cautious of exaggerated marketing and always do your research. Choose a reputable brand, and don’t fall for false promises. A good water purifier should be backed by real testing and proven performance.