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Since what year has CSST been installed in millions of homes in the United States?

  1. 1985

  2. 1990

  3. 1995

  4. 2000

The correct answer is: 1990

The use of Corrugated Stainless Steel Tubing (CSST) in residential applications began around 1990, and since then, it has been installed in millions of homes across the United States. CSST is favored for its flexibility, lightweight nature, and ease of installation when routing gas lines compared to traditional rigid piping. Its introduction marked a significant advancement in the materials used for gas distribution systems in homes, allowing for more efficient and safer installations. Understanding this timeline is important for home inspectors as they evaluate the gas systems in homes, ensuring they meet current safety standards and regulations.