Unbonded corrugated gas connection?

Shouldn’t this corrugated gas line be bonded? I can’t say it’s the utility companies problem since it’s on the house side of the meter. Thoughts anyone? Thanks!


Corrugated stainless steel tubing ( CSST ) must be bonded to the structure’s electrical system in accordance with NFPA 70 National Electrical Code (NEC) using bonding clamp(s) and wire sized appropriately per the manufacturer’s instructions.


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Hey Larry, thanks for the quick response. I can’t see the inside portion of the CSST. Do you think it would be possible to bond it from the other side?

I don’t know what you mean by “the other side”, but, I believe it is supposed to be bonded as close to the beginning as possible, like on that nut…as far as I know.

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What Larry said AND: The conductor must be attached to the piping system using a
listed bonding clamp based on UL 467. The bonding clamp must be accessible and can be located outdoors or indoors.

Must be accessible means you should see it.

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Ok, thanks. The point that it must be accessible is what i was looking for. It’s obvious I need to review my CSST bonding requirements. I appreciate the info sheet, Larry. Thanks Bob for the added clarification. Once again, it’s the forum to the rescue!

Seems to me, that since that CSST tubing is subject to damage, the black iron pipe should have run through the wall from the meter and switched to CSST on the interior.


I agree that it should be run with black iron pipe outside. I have asked about this with a local Gas provider when I have run across it and the response is “as long as it is not subject to damage”. Well, if it is outside it is subject to damage IMO! (some of the AHJ do not permit it)
When my son was a teen and cutting the lawn with my tractor he destroyed everything! That CSST would have been the first casualty :rofl: