CSST in return

[mathew stouffer]

I posted a previous thread regarding this issue and the discussion kind of went off track. Is CSST allowed in returns? I could not find anything on a manufactures tag. Sorry no pic yet.

[mathew stouffer]

Ok here is a pic. Got the light.

[Chuck Lambert]

I posted a previous thread regarding this issue and the discussion kind of went off track. Is CSST allowed in returns? I could not find anything on a manufactures tag. Sorry no pic yet.

Is ANY gas line allowed in a furnace return?? CSST or otherwise. Why would CSST be allowed and regular gas line not?

[mathew stouffer]

I don't know, and that is why I am asking. ;)

[Scott Patterson]

Well the picture is about an inch square so it is kind of hard to see anything, but nothing should be in a return duct. It should be a completely sealed with nothing in it other than the air that is being returned to the unit.

[John Dirks Jr]

It's especially risky to have CSST near conductive metal such as return ducting. It makes it more likely in the event of a lightning strike for arching to burn through the CSST and create a gas leak.

Always check for bonding of the gas piping, especially is there is CSST anywhere in the house.

[Chuck Lambert]

I don't know, and that is why I am asking. ;)

As Scott stated there should be nothing in the return. Gas lines are not allowed.

Chuck