Wood Insert to chimney liner connection

[Brendon]

Hi All,

Long time lurker....

I have just installed a SBI CW2500 insert with an insulated SS liner. The liner connects into a SS connector and that then slips into the insert.

Do both those joints require a high temp sealer? Can't find any info on that exact question and I've done a ton of googling. The install instruction's didn't mention it either. Maybe I'm over thinking it.

Seems strange to me that they connect that way instead of being inside each other in the flow of smokes path. Or does once the draft gets going it doesn't matter?

Thanks for your help.

 

[DAKSY]

Do both those joints require a high temp sealer? Can't find any info on that exact question and I've done a ton of googling. The install instruction's didn't mention it either. Maybe I'm over thinking it.

Nope. Not required, but many will seal those areas anyway.

Seems strange to me that they connect that way instead of being inside each other in the flow of smokes path. Or does once the draft gets going it doesn't matter?

The pieces fit inside each other from top to bottom so that any creosote will run down the inside of the pipe.

 

[mellow]

I would just add if you are looking to use a sealer grab some Rutland furnace cement from a local Ace hardware.

 

[Ashful]

Don't think of smoke flow when you think of the way one pipe fits in another, as the pipe is under vacuum, not pressure. Instead, think of the flow of rain water and condensation carrying creosote down the inside of the pipe, and then you'll understand why they go the direction they do.

The vacuum drawing smoke up the pipe is also why sealant is often not used, as any small leaks are inclined to draw room air, rather than blow smoke. I've seen some installs where sealant is used, and more where it is not, and hope someone here can explain why.

 

[Brendon]

Wow, I don't think I've ever gotten such quick responses on a forum!

Thanks for your replies...I didn't think of the creosote dripping down but now it makes perfect sense. I have some high temp sealant already but if it's not required I will not bother. Also didn't think of the pipes being under pressure as opposed to the flow of water.

I had installed the connector into the stove with some sealant last week. I just removed the stove to finish off the install of my blocking plate. The sealant that was there didn't seem to last that well after only a week.

Thanks again and have a great day.

 

[mellow]

What high temp sealant are you using? It needs to be rated for 2000+ degrees.