larger than the outside diameter of the tubing. Under concrete/asphalt slab, sleeved CSST must be buried in accordance with all local codes.

Where does CSST need to be bonded?

The CSST must be permanently bonded directly to the grounding electrode system of the electrical service of the home in which the CSST is installed.

Does black CSST need to be bonded?

In accordance with section 310.3 of the Fuel Gas Code, you probably don’t need any special bonding if you have black CSST. When building officials have asked the manufacturer how much distance is required, the manufacturer has left it up to the building official.