In short, flexible gas lines are perfectly safe as long as they’re properly installed. A CSST that is not correctly grounded or bonded can leak natural gas or become ignited, leading to a major fire hazard.

Can I use flex pipe for gas line?

Flex connectors: Flexible connectors are permitted to connect appliances to the gas piping. There has to be a shut-off valve at the connection to the rigid piping. This valve has to be in the same room as the appliance. … Flexible connectors may not be permitted on gas furnaces, water heaters, space heaters, etc.

Is yellow flex gas line safe?

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.