Yellow Gas Piping in Your Home May Pose a Safety Risk

DOVER, DE – The Delaware Department of Insurance, the National Association of Insurance Commissioners (NAIC) and the National Association of State Fire Marshals (NASFM) are teaming up to educate homeowners on a potential safety risk involving yellow flexible gas piping. The gas piping is known as corrugated stainless steel tubing, or “yellow CSST.”

“Homes with yellow CSST are at risk of perforation to the gas line caused by lightning strikes which could cause gas leaks or fires,” says Insurance Commissioner Karen Weldin Stewart. “If you are unsure as to whether your home has CSST or whether it has been properly bonded and grounded, contact a licensed electrician to arrange for a professional inspection.”

Corrugated Stainless Steel Tubing (CSST) - The New Gas Line ...

A few months ago, I wrote a blog about how great PEX tubing, and today I will discuss the equivalent for gas piping - pipes corrugated stainless steel, which is commonly known as CSST. It is a product that can be used to distribute natural gas or propane throughout the buildings.

A very brief history of the CSST

The main attraction of the CSST, that it is flexible and relatively easy to install compared to the standard gas piping.The gas connections to the pipework must be screwed laboriously, and the pipe itself must be measured, cut, bored, threaded, then cleaned. With the CSST tubing just gets cut to length and a fitting attached to the end. It is easy to understand why it has become a popular product.

Yellow Gas Piping in Your Home May Pose a Safety Risk

  1. Electricians and other trained professionals should consult local building codes as to required separations for CSST from conductive systems including metallic chimney liners, metallic appliance vents, metallic ducting and piping, and electrical cables.
  2. CSST is a flexible, stainless steel pipe used to supply natural gas and propane in residential, commercial and industrial structures. Coated with a yellow or occasionally black exterior plastic coating, CSST is usually routed beneath, through and
  3. 7.13.2 [Amendment] CSST gas piping systems, and gas piping systems containing one or more segments of CSST, shall be bonded to the electrical service grounding electrode system or, where provided, lightning protection grounding electrode system.
  4. There needs to be a separate bonding wire connected either to the rigid gas piping before the CSST, or directly to one of the CSST nuts. This is needed any time CSST is installed, even if it's just a small amount. The diagram below shows an example of
  5. Teel's death highlights an ongoing debate over the safety of the piping - known as corrugated stainless steel tubing, or CSST - which has been installed in as many as 10 million U.S. homes since the 1990s, according to some manufacturers' estimates