hearthtools said:I get people in my store every week wanting a Box or a thimble to go through the roof or wall for single wall pipe.
I tell them No such thing you have to use Class A and show them the Large ICC poster on my wall that shows all the differnt type of installations.
Most of the time I get
"NO WAY you are full of crap and just want us to sell us high priced pipe
We are just replacing Sigle wall pipe that has been through the roof for the past 30 years and it ant burt down yet."
I show them what they need and they cant aford that and walk out the door.
All day long. sigh......
I just explain pyrophoric carbonizaton and that usually gets there attention.