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using other brand of chimney pipe in my existing class a Air Jet triple wall chimney (thru the wall)

Post in 'The Hearth Room - Wood Stoves and Fireplaces' started by yeshuaschosen, Dec 29, 2012.

  1. yeshuaschosen

    yeshuaschosen New Member

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    I have a brand new thru the wall class a chimney kit made by Air Jet.Its triple wall pipe.I've been looking on craigslist for some good used air jet chimney pipe but so far I haven't been able to find ANY.I'm building a rocket stove mass heater that's going to need about 20 ft of interior pipe .It's going to run out from beneath my rocketstove barrel to a large bench .It will eventually be covered in cob and rock . (thermal mass)I'm going to need another 15 ft or so to run up to the roof thru my chimney kit. I've found plenty of double wall and triple wall pipe on craigslist ,eBay,etc.but no air jet triple wall chimney pipe .
    MY QUESTION is THIS:Is it possible to buy a conversion kit so I can use a different brand of insulated pipe in the chimney kit I presently have ? I'm right in the middle of building my rocketstove and need pipe before I can go any further with my project.I'm very frustrated at this point and think I may have taken on a project that's just too darn expensive.HELP!

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  2. chimneylinerjames

    chimneylinerjames Feeling the Heat

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    Do you want Triple wall pipe for the interior? what is going to be covered in the cob? I thought for rocket stoves you want single wall for that?
  3. yeshuaschosen

    yeshuaschosen New Member

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    I prefer to use insulated chimney pipe outside but my brand of chimney does limit what I can use for my exterior unless their is a conversion.I can't find used 6" air jet pipe anywhere!
  4. yeshuaschosen

    yeshuaschosen New Member

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    I have some 5' galvanized pipe.(2)sections that I 'm going to have to use in my bench if I can't find anything .I just can't afford to buy the new triple insulated pipe for outside.
  5. chimneylinerjames

    chimneylinerjames Feeling the Heat

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    I am slightly confused with what you have already compared to what you want to do. Do you have this chimney installed already? Can you provide some pics? I am not sure what this conversion kit you are referring to will convert.
  6. chimneylinerjames

    chimneylinerjames Feeling the Heat

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    Are you sure you want to us galvanized pipe under the cob? What if it rusts away? I would use stainless.
  7. begreen

    begreen Mooderator Staff Member

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    This sounds like a very permanent installation. Used AirJet pipe is going to be rare. Buy new AirJet class A pipe for the exterior. Do it right and do it safely.
  8. yeshuaschosen

    yeshuaschosen New Member

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    I plan on covering the galvanized pipe with a light coat of a homemade refractory mortar (fireclay,lime,sand,perlite, and portland )Ground up kitty litter (bentonite clay )works well as fireclay.Then covering it in cob.

    Method #2

      • 1.5 parts Portland cement (This is "NOT" a ready
        mix stuff. This Pure Cement - no rocks or sand)

      • 2 parts silica sand (The same stuff you use for your
        GreenSand)

      • 1.5 parts perlite (Pure - not a blend of other things
        meant for plants. "NOT" Vermiculite either!)

    • 2 parts fireclay or Well drillers mud (Bentonite Clay)
    You want to mix the dry parts thoroughly, it will take a while
    for the clay to bond to the sand. You could use a cement
    mixer/rolling tumbler/vibrating tumbler, but this is 'ONLY'
    for the dry parts, it's way to thick and gooey once you start
    adding the water.


    IMPORTANT: Add as little water as possible. You don't want
    it to be soupy you want more in the line of a moist cookie dough.
    Let dry for several days, (Even a week for bigger furnaces)
    then fire up the furnace on as low a setting as possible.
    (Remember "LOW AND SLOW"!)

    • 1st. burn for 15 minutes - let it cool down - COMPLETELY COLD!
    • 2nd. burn for 30 minutes - let it cool down - COMPLETELY COLD!
    • 3rd. burn for 45 minutes - let it cool down - COMPLETELY COLD!
    • 4th. burn turn up the heat and if no smoke or steam comes out
      you're ready to melt metal!
  9. chimneylinerjames

    chimneylinerjames Feeling the Heat

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    It's your project, but what about using a pipe that wont rust out over time? I think these rocket stoves are very interesting. They dont really follow any safety codes, so I am not sure how that works with your insurance but the idea is neat. I have talked to a guy before he used flexible chimney liner for under the cob. It is stainless steel and wont rot out. He like the liner that is corrugated also on the inside because it gave him more turbulence for the smoke which slowed it down. His thinking was this would mean a little more time for the smoke to be inside the home so his cob could get hotter. When he had to make a bend inside the home with the chimney liner, he was planning on using a "tee", this would not only make the 90* bend for him but also a way to clean out the pipe. They have a removable cap on the end for cleaning. Keep us posted, would love to see some pics of what you have now, the stove, chimney, where the cob will go, anything.
  10. yeshuaschosen

    yeshuaschosen New Member

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    I finished my chimney and have fired up my rocket stove.
  11. begreen

    begreen Mooderator Staff Member

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    Just in time! How's it cookin'?
  12. yeshuaschosen

    yeshuaschosen New Member

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    I made my own double insulated stove pipe using heavy duty black stove pipe and filled the space in between with thermix loose fill .I also used a reducer at the top of the stack.I joined the 6 and 8 inch pipe at the top and the bottom.I caped the fill with refractory cement and put rebar in so the fill wouldn't fall out.I attached my directional wind cap on top.It draws great and looks great.Cool to the touch outside .It isn't hot when it exits the home anyway.Steam comes out my chimney cap instead of smoke.Awesome rocketstove only uses sticks.The top of the barrel has been 400f.But the pipes have never get too hot to touch.

    Attached Files:

  13. yeshuaschosen

    yeshuaschosen New Member

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    My homes paid for so I don't carry insurance.Nonetheless I love my home and take good care of it.I never fail to address anything that needs fixed however I bought it in fair to good condition for very little and it's had a lot of repairs done on it.Unfortunately for most people insurance and codes are an issue .Building this type of rocket stove with bricks and barrel with mass makes a huge mess .I have 2 leaks in my pipe inside.When it cools down water drips out of the pipe.Condensation is a issue with these stoves so the pipes must be water tight.It would be great in a cabin or shed.Its taken me a while to build mine and I still have to cover it in cob.Its an ugly beast right now.
  14. yeshuaschosen

    yeshuaschosen New Member

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    Its hot! haha

    I wanted to share this with you just in case you know anyone that might want to build one. I've taken a more pictures of 'the beast' and will upload them later for you to see.

    I'm putting stucco on the outside wall where I closed off a leaky old roll out window.I need to treat the OSB board LATER.I'm waiting o a few warm dry days . I'll paint it with some oil based paint first to seal it.
  15. yeshuaschosen

    yeshuaschosen New Member

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    I'm putting bottle walls in the 2 old leaky windows beside my chimney.I'm closing off my north side windows.

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