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New Requirements for CSST Installation

Article and photos by Gregory HavelDownload this article as a PDF!The use of corrugated stainless-steel tubing jacketed with yellow PVC or polyethylene (CSST) as piping for natural and LP gas has been growing rapidly since its introduction in 1989. This is because of the greatly reduced installation labor compared to using conventional black pipe with threaded fittings. Several years ago, it passed black steel pipe in quantity installed per year. Photo 1 shows a natural gas service entering a building, with a field-assembled manifold for connecting CSST to serve three gas appliances, plus a run of black pipe serving another manifold on the other side of the building. (Since the connection...

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