My Account
I had a ComfortBuilt HP22 pellet stove all ducted and working fine. I recently got a hopper extension and found that the exhaust duct was too close to the stove so I have to extend it a bit. This requires separating the ducting but I'm finding it impossible to do and was wondering if anyone has any experience with this. I'm using Duravent double-walled 3" ducting and everything is sealed with RTV. I've been unable to pull the ducting apart to insert 6" extension pieces and I've tried using belt wrenches and vice grips to try and force-twist it to the separate but I'm not making any progress. Is there anything special I need to do like applying a type of solvent?
Could you post a couple of pictures to get a better idea of the ductwork? Thanks!
Here you'll see the appliance adapter, which connects to the pellet stove, is mangled as I've been trying to separate it from the other Duravent piping. The two components are glued together with RTV sealant and that is much more challenging to separate than I would have imagined. I thought just twisting them would make it separate but too strong of a bond. I tried a pipe wrench, two pipe wrenches on both components to magnify the opposing force of each, vice grips, inserting a putty knife, etc.
The following are different angles of the appliance adapter and the replacement adapter I would use if I could get it apart.
Since I initially posted I've found that it would be ideal to apply the sealant on the outside of the ducting albeit unsightly.
https://www.hearth.com/talk/threads/how-to-break-the-silicone-attaching-stove-to-pipe.55414/
If you have any suggestions to separate these components I appreciate it but I've already purchased another clean-out tee and I'm able to separate that part so I'm just going to replace these and get the pellet stove going.
Sorry for the delay in my response. I don't have a ton of experience with the double-walled stove pipe. I would probably work back to each connection seeing if any are easier than others to break free. If I could find one with a little less RTV or just works loose for some reason I would rebuild to the new configuration you need now.
Since it has been a while did you figure out a solution?
