Hi. So I have a home built in 1995 and had natural gas. The first foot inside the house is iron, then CSST for about 20’, then iron throughout the house. I’m going to tee off the CSST to run another csst line for my attached garage and I know the gas line needs to be grounded. I don’t see an existing ground so my question is, can add a ground to any part of the iron gas line or does it need to be before the CSST? I’ve seen conflicting answers about grounding directly to a CSST fitting but I assume that’s if all you have is the CSST. It would be easier for me to ground the iron pipe that runs to the furnace back to the panel if that’s acceptable.