Connecting Double Wall Stove Pipe to Existing Liner in Masonry Chimney

[Turbo89]

Hi, I posted a few weeks back about converting a lined oil furnace vent to wood stove. I since had it inspected, and was told it was in great shape and suitable for a wood stove.

I’m trying to connect 6” Selkirk double wall stove pipe to the below thimble. It looks like the liner snout is 6” and connected to a 7” single wall adapter (furnace pipe size).

I identified a Selkirk DSP6MA Masonry adapter to make the thimble / connect the snout to the double wall stove pipe.

Some questions:
1. My plan is to leave the 7” liner in place and just cut the Protruding screws off so the adapter slides in, does that sound right?
2. How does the DSP adapter get secured? From Sellkirks documents it sounds like it just slides in.
3. The about looks crimped, does that cause any issues with my plan?

 

[Turbo89]

Bump

 

[Whitenuckler]

Hi, I posted a few weeks back about converting a lined oil furnace vent to wood stove. I since had it inspected, and was told it was in great shape and suitable for a wood stove.

I’m trying to connect 6” Selkirk double wall stove pipe to the below thimble. It looks like the liner snout is 6” and connected to a 7” single wall adapter (furnace pipe size).

I identified a Selkirk DSP6MA Masonry adapter to make the thimble / connect the snout to the double wall stove pipe.

Some questions:
1. My plan is to leave the 7” liner in place and just cut the Protruding screws off so the adapter slides in, does that sound right?
2. How does the DSP adapter get secured? From Sellkirks documents it sounds like it just slides in.
3. The about looks crimped, does that cause any issues with my plan?


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Does your wood stove say to use double wall?

 

[Turbo89]

Does your wood stove say to use double wall?

It’s a local code thing (town demands it), and while I don’t need the clearance it’s always nice to have a bit more, so I’m sticking with it (I already bought it all).

 

[Whitenuckler]

It’s a local code thing (town demands it), and while I don’t need the clearance it’s always nice to have a bit more, so I’m sticking with it (I already bought it all).

I guess I'd would just make something, as you need to transition from DW to SW and as long as it's a horizontal section, that is small it should work. I believe there are some special sections that they use to go from SW to a DW ceiling box but I don't know if they could be used.

 

[Turbo89]

I guess I'd would just make something, as you need to transition from DW to SW and as long as it's a horizontal section, that is small it should work. I believe there are some special sections that they use to go from SW to a DW ceiling box but I don't know if they could be used.

Yea, i get it. I think the part I bought is that something, I’m just wondering how it should be secured. Everything I’m reading seems like it slips in, but I’m sort of shocked I don’t need to cement or otherwise fasten it.

 

[Whitenuckler]

Yea, i get it. I think the part I bought is that something, I’m just wondering how it should be secured. Everything I’m reading seems like it slips in, but I’m sort of shocked I don’t need to cement or otherwise fasten it.

The SW to SW part could be siliconed if there is no room for a screw(s) too. The other SW to DW could be screwed ?

 

[Turbo89]

The SW to SW part could be siliconed if there is no room for a screw(s) too. The other SW to DW could be screwed ?

Yea, the double wall to thimble will be screwed, there’s definitely no room to get a screw in there unless I bust some cement out. I’d rather not disturb that 7” single wall adapter that’s in there, it’s doing a good job holding the liner tee snout in place, so
Silicone sounds like a good idea.

 

[stoveliker]

You could use a 90 deg head for a drill, drill holes, and use rivets - all from the inside.

 

[Whitenuckler]

You could use a 90 deg head for a drill, drill holes, and use rivets - all from the inside.

Great idea. The only way I had was to remove some material to make places for screws.

 

[Turbo89]

Rivets is a good idea, although I wonder if they’re listed for use in a chimney?

How firm is this tee snout going to be, is it really a risk that I knock it off? I could probably chisel out cement to get a right angle drill in there.

 

[Turbo89]

I finished this install today, the adapter worked great. I ended up having to trim it per sellkirk instructions and I used Furnace cement to seal it in. There’s some points on the collar to lag it to the wall, I’ll add those before I light the first fire.

Funny thing - I found small pocket flashlight at the bottom of the tee snout trap, that looks like it’s been there for years and covered in soot. The liner installer must have lost it at install 🤣🤣

 

[begreen]

Rivets is a good idea, although I wonder if they’re listed for use in a chimney?

Must be stainless rivets, not aluminum.

 

[Turbo89]

Must be stainless rivets, not aluminum.

I noticed today that the sellkirk masonry adapter was riveted, so I guess they’re widely used.