Stove pipe elbows – regular vs. corrugated? I need to install new single wall flue pipe from the stove to the wall thimble. The existing black pipe from Tractor Supply rotted out in two seasons you can poke your finger thru it. I need a 90*elbow, 30” straight, and another 90* elbow and I’m looking at the corrugated elbows as opposed to the more common 3 section elbows. Is there any advantage (or dis-advantage) to the corrugated? I’m thinking that the corrugated would last longer. Any input…Greatly appreciated.