If your home uses natural gas and you haven’t heard of CSST, keep reading! CSST, corrugated stainless steel tubing, is a yellow flexible tubing with a smooth sheathing over the corrugation and is used to make gas connections in a home. It is not to be confused with a
CSST & Lightning; Are Your Lines Bonded and Grounded?
If your home uses natural gas and you haven’t heard of CSST, keep reading! CSST, corrugated stainless steel tubing, is a yellow flexible tubing with a smooth sheathing over the corrugation and is used to make gas connections in a home. It is not to be confused with a flexible gas connector (FAC), which can also be yellow, but will have an exposed corrugation.
Gas piping should be installed with as few connections as possible to minimize the number of locations for possible gas leaks. With its ease of installation and ability to flex around walls and cabinets, CSST has become increasingly popular since the 90s. Though CSST has become a modern convenience, if not properly bonded and grounded, can cause a serious hazard if lightning strikes.
CSST was originally developed in the 80s and did not endure lightning safety testing before being widely installed. It was later found that a lightning strike to the structure, directly or even near the house, can cause holes to be burned in the thin walls of the CSST. The leaking gas then ignites causing a blow torch effect, setting fire to the structure. There have been several class action lawsuits against various manufacturers of CSST bringing about new guidelines for bonding and grounding.
U.S. building codes do currently require direct bonding of CSST but have only done so since 2009. Local municipalities rules may have been updated even later. If you have concerns the CSST installation in your home, it is important to have it inspected and if need be, have the CSST bonded by a qualified electrician. Keep in mind that with every GreenWorks inspection, proper and safe CSST installation is always examined!
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