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Galvanized pipes have been widely used in the past for gas, heating, and water supply systems. However, over time, these pipes tend to corrode, leading to the formation of rust inside the walls. This rust can cause discolored, yellowish water that not only stains bathroom fixtures but also harbors harmful bacteria due to the rough inner surface. Moreover, the accumulation of rust increases the concentration of heavy metals in the water, which poses serious health risks to individuals who consume it.
In the 1960s and 1970s, many developed countries began phasing out galvanized pipes and introduced safer alternatives such as copper, PVC, or PEX piping. These new materials are more resistant to corrosion and provide cleaner, healthier water. In China, the Ministry of Construction, along with several other government departments, issued a regulation stating that galvanized pipes would be gradually banned from use in residential buildings starting from the second year of implementation. As a result, galvanized pipes are now rarely used for cold water systems in new residential areas.
However, they may still be temporarily allowed for hot water applications in some cases. Despite this, it's strongly recommended to replace old galvanized pipes with modern, non-corrosive materials to ensure long-term safety and efficiency in plumbing systems. Regular maintenance and inspections are also essential to detect early signs of corrosion and prevent potential health hazards.
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