Originally Posted By: jpope This post was automatically imported from our archived forum.
National codes defer to manufacturers recommendations and/or local AHJ, but this is typically okay for CSST. Appliance connectors (not the same as CSST) require “protection from damage” if passed through a wall.
Originally Posted By: dandersen This post was automatically imported from our archived forum.
This is not the flex pipe you see at indoor appliances (under stoves). It is designed for just this use. We have an education/ certification requirement to use/buy this type of piping in TN.
It's like flex duct. It has it's uses, but I don't like to see it run all over the place.
In this case, it gives you a way to retrofit the fireplace through the wall without fittings.
I would call it out if it is not protected from a lawnmower ect...
I have seen damage leaks from this application too close to the ground.