According to the German “Journal of International Health and Environmental Healthâ€, researchers from the United Kingdom, Spain, and the Netherlands found in long-term experiments that stainless steel faucets form an environment suitable for the growth of Legionella species after aging in the surface layers. A type of Legionnaire's disease (a typical symptom of pneumonia) and other respiratory diseases.
In the three years, the researchers tested the advantages of the three faucets made of stainless steel, brass and ceramics for the survival of Legionella. The water in the faucet was transported by metal conduits and plastic conduits, respectively. Scientists previously believed that metal conduits will generate rust molecules and thus promote the reproduction of Legionella.
This experiment proves that in the third year of using stainless steel faucets, the number of Legionella species in the water will rapidly increase due to aging of stainless steel faucets that can resist corrosion. An average of one-half of all stainless steel faucets breed Legionella (the Netherlands is more typical), while only a quarter of brass and ceramic faucets breed Legionella, and the use of plastic or metal conduit is essentially Does not affect the experimental results.
In addition, the study also pointed out that brass faucets are the safest. However, in fact, people's demand for brass has gradually declined in recent years. There are two reasons. One is that the high-quality faucets made of brass and bronze are expensive, and the second is that producers have to enter the market to save costs and add silicon to the mixture. This increases the brittleness of the faucet and shortens it. life. Stainless steel faucets are cheaper and less brittle, which is more in line with consumer demand.
According to the report, Legionella not only causes veterans' disease, but also causes chronic diseases that are not easily diagnosed. For example, Pontiac fever, which is generally considered to be a common acute respiratory virus infection.
Source: Global Network
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