#1  
Old 06-30-2012, 08:55 AM
kebwi's Avatar
Il Pizzaiolo
 
Join Date: Aug 2009
Location: Seattle, WA, USA
Posts: 1,010
Default Insert damper into double-walled stovepipe?

Dampers like this:

Chimney 31330 Cast-Iron Stovepipe Damper - 7 Inch: Amazon.com: Home & Kitchen



are easy to find online, and are described as being installed by punching the sharp end through the side of the pipe. However, I think most such examples suggest simple straight-forward single-walled pipe?

Will such an installation method work on double-walled pipe or do the extra walls and the "stuffing" in between make this infeasible?

Plus, I'm not sure it'll fit, I need an extra two inches of clearance for the pin of course.
__________________

Website:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

WFO Webpage:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Thread:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Reply With Quote
  #2  
Old 06-30-2012, 06:30 PM
Gulf's Avatar
Il Pizzaiolo
 
Join Date: Sep 2011
Location: Mississippi
Posts: 1,398
Default Re: Insert damper into double-walled stovepipe?

I may have missed it on your chimney thread, but did you search the manufacturer who made your pipe? The best that you could hope for is that they have a damper and sleeve that mates to your existing pipe. If you are going to retro fit, you might think about going to a metal shop and get a bid on a sleeve with a damper that they have fabbed. I'm thinking that it would be better to find something that you could fit on top of your base plate or between the first two sections of pipe. Just thinking, how hard would it be to remove your base plate? There are a lot of options for you if you can.
__________________

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #3  
Old 07-01-2012, 09:07 AM
Neil2's Avatar
Il Pizzaiolo
 
Join Date: Oct 2006
Location: Vancouver Island
Posts: 1,374
Default Re: Insert damper into double-walled stovepipe?

Why do you want a damper ?
Reply With Quote
  #4  
Old 07-01-2012, 09:30 AM
Faith In Virginia's Avatar
Master Builder
 
Join Date: Oct 2010
Location: Virginia
Posts: 720
Default Re: Insert damper into double-walled stovepipe?

I believe it was suggested to him for when he puts on 20' of chimney pipe.
Reply With Quote
  #5  
Old 07-01-2012, 08:55 PM
kebwi's Avatar
Il Pizzaiolo
 
Join Date: Aug 2009
Location: Seattle, WA, USA
Posts: 1,010
Default Re: Insert damper into double-walled stovepipe?

That's the idea. I'm reconsidering whether to use the full 19' I have available, but even if I only use 15' or even 11', I'm thinking perhaps I need a damper.

...although it was never really explained to me why the strong draw of a long flue would be bad or otherwise what effect it would have on the oven's behavior.
__________________

Website:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

WFO Webpage:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Thread:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Reply With Quote
  #6  
Old 07-01-2012, 10:22 PM
kebwi's Avatar
Il Pizzaiolo
 
Join Date: Aug 2009
Location: Seattle, WA, USA
Posts: 1,010
Default Re: Insert damper into double-walled stovepipe?

Quote:
Originally Posted by Gulf View Post
I may have missed it on your chimney thread, but did you search the manufacturer who made your pipe? The best that you could hope for is that they have a damper and sleeve that mates to your existing pipe. If you are going to retro fit, you might think about going to a metal shop and get a bid on a sleeve with a damper that they have fabbed. I'm thinking that it would be better to find something that you could fit on top of your base plate or between the first two sections of pipe. Just thinking, how hard would it be to remove your base plate? There are a lot of options for you if you can.
So, is your post basically confirming my original post, that although these dampers are described as self-boring, that only applies to single-walled and not double-walled pipe?
__________________

Website:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

WFO Webpage:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Thread:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Reply With Quote
  #7  
Old 07-02-2012, 10:21 AM
Gulf's Avatar
Il Pizzaiolo
 
Join Date: Sep 2011
Location: Mississippi
Posts: 1,398
Default Re: Insert damper into double-walled stovepipe?

If the damper is small enough to have some clearance inside your pipe, I think it can be made to work. The damper in your case does not have to have a perfect seal. Punching a hole through stainless steel want work real well though. If you place a block of wood inside the pipe and block it up so that you dont bend you inner pipe you can probably use the pin to make some pilot dents to help start a drill bit. You've already determined that a longer pin would have to be made.
__________________

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #8  
Old 07-02-2012, 11:23 AM
deejayoh's Avatar
Il Pizzaiolo
 
Join Date: Jul 2010
Location: Seattle
Posts: 1,208
Default Re: Insert damper into double-walled stovepipe?

Keith - can you use one of the prefabbed damper sections?

Damper Section

Also, I note that the larger diameter duravent products seem to have dampers in the anchor plate. Might that be a better place to install it? Seems like a sturdier piece of metal given it's relatively short length
__________________

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Last edited by deejayoh; 07-02-2012 at 11:28 AM.
Reply With Quote
  #9  
Old 07-02-2012, 07:49 PM
Journeyman
 
Join Date: May 2009
Location: Detroit
Posts: 383
Default Re: Insert damper into double-walled stovepipe?

I think the damper here is overkill. The stack in a black oven does not pressurize the oven chamber, like in a blast furnace for example. Excessive draw should not be an issue, many commercial ovens run on much taller stacks then that.

If you still want to add a damper I can certainly help you out. I'm a union sheet metal worker. Installing this stuff is what I do for a living.
Reply With Quote
  #10  
Old 07-03-2012, 01:35 PM
kebwi's Avatar
Il Pizzaiolo
 
Join Date: Aug 2009
Location: Seattle, WA, USA
Posts: 1,010
Default Re: Insert damper into double-walled stovepipe?

I certainly would be curious to get a greater breadth of input on this matter. The oven is 36" (which should give some indication of the scale of the fire) and the new stove-pipe will be 7" inner diameter. At what length might a damper become helpful...if any? I have up to 19' of stove-pipe although I'm seriously reconsidering my design because that's kind of insane, perhaps more around 11', but perhaps a touch more if I think I can get away with it, depending on the rigidity of my structural support. I've had some people advocate for a damper and others not so much.

Thoughts?

Thanks.
__________________

Website:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

WFO Webpage:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Thread:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Metal Chimney, Single or double walled? dvm Tools, Tips and Techniques 8 09-15-2013 03:46 PM
Single Wall or Double Walled Flue? chidding Design Styles, Chimneys and Finish 7 03-31-2013 09:27 PM
Why double walled chimney pipe? Dan94550 Tools, Tips and Techniques 4 10-14-2007 05:00 AM


All times are GMT -7. The time now is 03:14 AM.

Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
2006/10 Forno Bravo, LLC