According to the National Fire Protection Association (NFPA), there are, on average, 4,400 lightning fires every year to residential buildings. About 160 of those fires involve gas piping systems, including both rigid and flexible gas piping.

• A class-action lawsuit filed in Arkansas against four manufacturers of CSST claimed that if homeowners had a lightning strike to their house that contained yellow-jacketed gas tubing, the lightning could cause a fire — and requested that the court order all CSST be removed from every house in the United States because it posed an unreasonable risk of fire from lightning strikes. In 2006, the parties reached a settlement that was worth up to about $29 million, according to a copy of the settlement agreement.

• Last year, a jury found one brand of CSST to be a defective product and imposed strict liability against that manufacturer, awarding  100% recovery of both the subrogated and uninsured losses for a total judgment that will exceed $1 million. The jury found that the manufacturer was not negligent in the design of the product. The case involved a CSST line that was installed in 1998 and failed from the effects of indirect lightning in June 2007. The case is currently under appeal.