Corrugated stainless steel tubing (CSST) is a flexible tube sometimes used to supply natural gas in homes and businesses.
If your home or business was built after 1987, or if work on your natural gas piping system has been performed since then,
CSST may have been installed. CSST is flexible steel piping used in place of rigid, black steel pipe to supply natural
gas within your home or business. CSST often is covered with a yellow or black plastic coating. Don’t confuse CSST with
the flexible natural gas connectors linking an appliance, such as a clothes dryer, to your natural gas supply line.
CSST usually is routed beneath, through and alongside floor joists in your basement, within interior wall cavities and
on top of ceiling joists in attic spaces.
If lightning strikes a building with CSST, the lightning could travel through the structure’s natural gas piping and
cause a leak. In some cases, a fire or explosion may occur if the CSST isn’t properly grounded. If you have CSST,
we recommend contacting a licensed electrician or the installer of the CSST for an inspection. CSST that hasn’t
been properly grounded should be bonded to the building’s electrical grounding system according to the manufacturer’s
instructions and the National Electrical Code.