Screws in double wall stovepipe

[BethelStrong]

Hello,

The screws that came with my telescopic stovepipe (Selkirk) seems short and weak. Are they suppose to go through both the outer and inner walls of the pipe, or just squeeze against the inner pipe?

I have bought longer thicker screws made by Imperial specifically for stovepipe, but seeing the screws that came with the pipe I’m unsure if that’s right to go through both (which seems the only secure way to secrete the pipe to the top connector (chimney) and to keep the telescopic pipe from sliding.

Just want to make sure I’m not messing it up. My first stove install...

 

[bholler]

Hello,

The screws that came with my telescopic stovepipe (Selkirk) seems short and weak. Are they suppose to go through both the outer and inner walls of the pipe, or just squeeze against the inner pipe?

I have bought longer thicker screws made by Imperial specifically for stovepipe, but seeing the screws that came with the pipe I’m unsure if that’s right to go through both (which seems the only secure way to secrete the pipe to the top connector (chimney) and to keep the telescopic pipe from sliding.

Just want to make sure I’m not messing it up. My first stove install...

They are just supposed to attach the outer wall to the other outer wall and not touch the inner wall

 

[BethelStrong]

They are just supposed to attach the outer wall to the other outer wall and not touch the inner wall

Ok thanks, so should I pilot hole into the second outer wall? The main outer wall already has holes, but like I said, these little screws look poor.

Also, how about the top of the stovepipe, in the crimp? Do I go through both crimps? By going through both crimps completely, I’d be exposing a lot of heat to the screw and a possible leak in the pipe if the screw does fit tight.

Thanks for your help!

 

[ckr74]

You don't want to penetrate the inner pipe.

 

[BethelStrong]

You don't want to penetrate the inner pipe.

Ok thanks, but how about at the connection at the chimney support? I mean where there is a crimp end sliding into the other crimp of the connector... Those crimps essentially make it so there is no double wall until the two crimps come together. Am I understanding that the small screws just penetrate one pipe even at the crimps/connections, and just squeeze on the inner pipe and that holds the pipe well enough?

I just don’t want this telescopic stovepipe sliding down during a fire [emoji2957]


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[Highbeam]

The screws that lock the overlap in the middle will prevent the whole thing from collapsing during a fire. It’s locked in place. Often those are the only screws you can put in.

 

[BethelStrong]

Got it done! Thanks for the direction.


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[BethelStrong]

Thanks for the help everyone. It feels stout now, and looks good too. How about a fire [emoji91]?


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[LucianW]

I am having this same problem. I called Selkirk and they said the screws weren't supposed to penetrate and that can't be right.

 

[rudysmallfry]

Ok thanks, so should I pilot hole into the second outer wall? The main outer wall already has holes, but like I said, these little screws look poor.

Also, how about the top of the stovepipe, in the crimp? Do I go through both crimps? By going through both crimps completely, I’d be exposing a lot of heat to the screw and a possible leak in the pipe if the screw does fit tight.

Thanks for your help!

Crimped end faces up in double wall. It's reversed from single wall where the crimped end goes into the stove opening. The doubled up side just sits on the stove opening. Use some furnace cement to keep it in place. No screws.

 

[begreen]

Crimped end faces up in double wall. It's reversed from single wall where the crimped end goes into the stove opening. The doubled up side just sits on the stove opening. Use some furnace cement to keep it in place. No screws.

This depends on the stovepipe brand. It's true for the outer wall of Selkirk DSP which has a crimp on the outer wall. The inner liner is also crimped and that end points down toward the stove.

 

[rudysmallfry]

This depends on the stovepipe brand. It's true for the outer wall of Selkirk DSP which has a crimp on the outer wall. The inner liner is also crimped and that end points down toward the stove.

I was not aware of that. Thanks for the clarification.

 

[LucianW]

This depends on the stovepipe brand. It's true for the outer wall of Selkirk DSP which has a crimp on the outer wall. The inner liner is also crimped and that end points down toward the stove.

View attachment 304168

The chimney sweep that helped me install my chimney flipped out when he saw the Selkirk pipe. Insisted the stickers were on backwards. I am pretty sure he wanted to sell me a Duravent pipe. I talked to his partner, the certified chimney installer, and everything we talked about gave me confidents in the Selkirk pipe.