For three months, NBC 5 Investigates looked at the safety of flexible gas lines known as CSST, corrugated stainless steel tubing. It’s a product used in millions of newer homes and is approved for use in national building codes.

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News 5 Most Recent Interview on CSST

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http://www.nbcdfw.com/news/local/CSST-Blamed-in-Flower-Mound-House-Fire-243015311.html