help identifying 6 inch stainless steel class a chimney

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fireplacetony

New Member
Oct 8, 2026
4
South Dakota
Looking for some help identifying an existing stainless steel insulated chimney system.


A contractor friend of ours is repairing a cabin where a tree damaged approximately a 4-foot section of chimney and crushed the cap.


Here’s what we know:


  • Approximately 6” inside diameter / 8” outside diameter
  • Stainless steel, insulated Class A chimney
  • Installed several years ago
  • Appears to have a twist-lock or stamped locking-tab connection
  • No manufacturer markings identified yet
  • Used with a wood-burning stove/pizza oven

We’re wondering whether this might be Simpson DuraVent, Selkirk Metalbestos, or another manufacturer.


I’ve attached photos of the existing chimney connections and damaged cap.


Does anyone recognize the manufacturer or specific chimney system from these pictures?


We want to positively identify it before ordering a replacement section and cap to make sure everything is compatible.


Any help would be appreciated!


Tony
Fireplace Professionals
Sioux Falls, SD


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The chimney cap and pipe look like Security's Secure Temp.
What happened here? Did the wind blow it down?
 
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The chimney cap and pipe look like Security's Secure Temp.
What happened here? Did the wind blow it down?
Thanks for the help! A tree fell on the cabin and damaged the chimney during a storm.


That’s interesting about Security Secure Temp. Is there something specific about the cap or locking connection that identifies it? We’re trying to positively identify the manufacturer before ordering a replacement 4-foot section and cap.
 
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Security has that flat top.
[Hearth.com] help identifying 6 inch stainless steel class a chimney
 
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Here’s a piece of Selkirk I have
 

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