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Found it - 3" to 2" flex aluminum fireproof OAK adapters for Selkirk DT or just long runs!

Post in 'The Pellet Mill - Pellet and Multifuel Stoves' started by Don2222, Apr 9, 2013.

  1. Don2222

    Don2222 Minister of Fire

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    Hello

    Since PVC and anything not fire proof is not within code, there are very few off the shelf parts!

    You guys know, that when using 3" diameter flex aluminum OAK venting, most pellet stoves have a 2" OAK flange. The code states no PVC solution even though the intake air is cool.

    Here is what I found from Pep Boys and Advanced Auto Parts for $9.47 !

    Pep Boys
    1. NI (Nickerson Industries) Adapter for auto exhaust systems
    2-1/2 ID and 2-1/4 OD part # 17518

    Advanced Auto parts
    2. 2-1/4 ID and 2-1/8 OD Part # 548521
    3. Autocraft 2 2-1/2 to 3-1/2 Hose Clamps

    Some stoves like the Santa Fe only needs the 1st adapter.
    Other stoves like the Englander 25PDVC also needs the 2nd adapter for a better fit on the stove flange.

    High Temp RTV can also be used here for a nice solid seal

    Pic 1 - Hose clamp and 2 exhaust adapters
    Pic 2 - cost
    Pic 3 - Englander 25-PDVC with both adapters connected
    Pic 4 - Hose Clamp
    Pic 5 - 1st adapter with foil tape and hose clamp for a snug fit.
    Instead of the foil tape you can also put cuts in the flex tubing to reduce it and clamp it.
    Pic 6 - Fire Proof 3" to 2" OAK connection ! ! !

    Click to Enlarge

    Attached Files:

    AJ9, mralias and moey like this.

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  2. john193

    john193 Minister of Fire

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    Thanks for the write up! Do you know if the intake on the santa fe is the same diameter as the mt vernon? This has been something I've been meaning to look into as well.
  3. Don2222

    Don2222 Minister of Fire

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    Usually all quads are the same so my educated guess would be yes. That 1st piece and the radiator clamp should do the trick. :)

    Please let us know.
    Thanks
  4. BrotherBart

    BrotherBart Hearth.com LLC Mid-Atlantic Division Staff Member

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    Excellent.
  5. john193

    john193 Minister of Fire

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    By the first piece are you referring to the part from pep boys?
  6. Don2222

    Don2222 Minister of Fire

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    Yes, you are correct!
  7. ivanhoe

    ivanhoe Feeling the Heat

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    i wonder how much a muffler shop would charge to expand a piece for you? it could be another option to look into!;)
  8. Don2222

    Don2222 Minister of Fire

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    Good Idea, but that is custom work so the shop must be able or just willing to do that.
  9. Don2222

    Don2222 Minister of Fire

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    Yes, but I just found the same piece at Advance
    2-1/2 ID to 2-1/4 OD part # 548518A
  10. Don2222

    Don2222 Minister of Fire

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    Hello

    Just found another adapter at PEP Boys

    Nothing is perfect but this is very close and will fit some stoves like the Santa Fe better. The two above together will fit the 25-PDVC better.
    NI (Nickerson Industries) Adapter for auto exhaust systems
    2-1/8 ID and 2-1/2 OD part # 17558 (548558)

    Therefore you may need to test it, but with some High Temp Silicone it can be a good seal!
  11. EastMtn

    EastMtn Member

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    The Selkirk install manual says "
    If the diameter (OD) of the inlet is less than 3”, make 4 to 6 three inch long parallel cuts equidistant around the circumference of the flex pipe end.
    Overlap the cut edges to reduce the flex pipe end diameter to the diameter of the stove combustion air inlet."
    From a newbies point of view what is the difference between cutting slits and using a 3" to 2" adapter for the OAK?
  12. Don2222

    Don2222 Minister of Fire

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    I have seen the cuts work, but it is tedious. The adapter must be fire proof, that is the stipulation, so the only adapter that I could find that was fire proof is the muffler adapter. Therefore either way works, I do prefer the muffler adapter because it is much easy to get off and back on when servicing the stove. :)
  13. EastMtn

    EastMtn Member

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    Thanks. Gives me something to research tonight at work.
    What about a silicone adapter for a turbo intercooler? They get pretty hot. Use a 3 in. connector so that the hose clamps have something rigid to clamp onto. Their temp rating may not be high enough though.
    I'll keep looking.​
    1)Working Temperature: -76°F (-60°C ) to +500°F (+260°C)2)Working Pressure: 0.3Mpa (43.5 PSI) to 0.9Mpa (130.5 PSI) 3)Bursting Pressure: 2Mpa
    4)Thickness: 5mm, 4 ply reinforced 5)Size tolerance: +/-0.5mm

    6)Inside Diameter: 2.0"-3.0" (51mm-76mm)
    7)Length: 76mm
    8)Wall: 5 mm
  14. EastMtn

    EastMtn Member

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  15. Don2222

    Don2222 Minister of Fire

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    Good find!

    However The 2-1/2 ID I used was easy to get the 3" OAK metal flex over it. It may be too hard to stretch it out to get it over the 3" ID SS piece you found

    If this company makes a 2-3/4 to 2" SS adapter that would be ideal!

    E-Bay has it cheaper than Amazon
    http://www.amazon.com/Stainless-Ste...merchant-items&ie=UTF8&qid=1370267177&sr=1-14

    Alot cheaper than speedy racer!
    http://www.speedyracer.com/Piping-Reducer-2-to-3-Stainless-Intercooler-kits?filter_name=piping 2-3

    and buy zillion too
    http://www.buyzillion.com/1117169882332606/stainless-steel-exhaust-piping-reducer-2-to-3

    [​IMG]
  16. Don2222

    Don2222 Minister of Fire

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    EastMtn likes this.
  17. smwilliamson

    smwilliamson Minister of Fire

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    I think Quad uses a 3" on all models, though you have to mount a collar to the back of the appliance to receive it. Also, when using OAK on quads it's important to keep the ash pan area clean as the air come in from under the tray.
  18. Don2222

    Don2222 Minister of Fire

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    Hello

    I have 2 Sante Fe's and a Contour. They all have 2" OAKs, that is why I got the adapter above!
    Pic below is a Quadrafire SantaFe with adapter.

    [​IMG]
  19. moey

    moey Minister of Fire

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    if only you could find a 90 degree flange for the classic bay I ended up using a exhaust flange and 2 inch pipe worked but kinda clap trapy

    Looks good..
  20. EastMtn

    EastMtn Member

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    I ordered the 2 to 2.5 in and the 2 to 3 in for my install. We'll see how it comes out.

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