i can tell you there is a big difference between supply house gas pipe and the stuff big box stores sell( when in a pinch you need a piece and cant get to a supply house) it doesnt thread as well, seems the threads get ripped off the pipe...
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I see a lot of CSST here. Most have moved to Counterstrike when it came out so you can drop the required electrical bond. They run the main in black and then branch out for fireplaces, stoves, 2nd. floor furnaces with it.
Several years ago in a nearby town with the yellow CSST. The installer ran it through the metal case of a gas fireplace. A nearby lightening strike delievered a static charge to it and blew a small hole thorugh it. Dang near blew the house up as the ethyl mercaptin filled the fireplace chase before anyone noticed the smell.
The mandate to bond the yellow pipe has always been inplace but missed. #6 bare wire anyplace on the system back to the main panel.
Once the counterstrike came out that went away.
Who remembers the "pulse" furnaces that you had to use a flex connector to so the vibration could be handled?
They require counterstrike to be bonded here. They don’t care what the manufacturer recommends.