I think this is a double lined pipe growing all the way up. It looks like there are a few areas that are resting through. Anything to worry about?
I would really think about replacing that. That pipe can be kind of pricey but a fraction of the cost it would be if it caused a fire. If it was me I would take any chances.
It appears to be 6" Class A insulated double wall Stainless Chimney. Replace with the same as most current stove models require that size. The outer diameter will be 8". There are several manufacturer's that offer it. Yours is compromised by the looks of it and will never heal. Not really a household item to try and milk out in my opinion.
Definitely replace the whole chimney with new Class A pipe. The first photo looks like it had some type of failure (water corrosion or hot hot chimney fire, but I'd expect more discoloration and damage if that happened) but either way its toast!!! I'm curious what the inside of that pipe looks like, just to be nosey....
Not all manufactures of Class A chimney have an outset offset; I know because my brand didn't have an outside offset as stated in the literature. They did have an offset for location inside of an attic space but not for outside of the house. I don't know the difference but just wanted to point that out.
Oh, I wouldn't use the appliance until the chimney was replaced. I wouldn't try to just repair sections; for one, it is built on a bottom up procedure so it would all have to come down to remove a section, and you could see other sections failing later.
If you remove the clean out at the bottom, you can shine a torch up into the chimney for inspection; try taking a photo and posting it. You can actually twist off the bottom section under the tee instead of just the plate at the very bottom; give you a bit more room. Watch your eyes when you do; wear goggles.
Am I the only one that would be upset at a local stove shop or sweep talked me into stainless and it corroded through like that? Am I the only one that would be skeptical of some sweeps “preferred brand” of pipe they sell? Sorry. I would not be a happy camper about that sales job.
Yes, there are different degrees of stainless steel. Low end stainless will rust; usually pin holes will start to come into the metal A lot of the Chinisum stainless steel cookware is low end stuff; it is one reason it is so cheap besides the slave labour market.
Thanks for all the advice about this. I am in the middle of a career change an neglected to respond. I am goin to call somebody about it.
I thinks what has happened is there is a joint where the chimney meets the roof line. There does not appear to be a ring around the joint and water comes off the roof and hits the joint and leaks in. Is there insulation between the 2 layers?
When I remove the cap in the bottom there was about a 2” layer of wet black ash. I will shine a light up it tomorrow and see what I can see
The ring is a locking ring to prevent the sections from coming apart; although you have to rotate the sections to remove them. Water would not be able to enter even without the locking ring as the sections overlap at the joints; the section on top being female to fit into the male section below.
